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# Domain Management
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Main entry point providing access to all Chrome DevTools Protocol domains through the v138Domains class. This central coordinator initializes and manages all CDP domain implementations for version 138.
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## Capabilities
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### Domains Factory
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Creates and manages all CDP domain instances with proper DevTools integration.
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```java { .api }
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/**
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 * Main CDP domains aggregator providing access to all protocol domains
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 * @param devtools DevTools connection instance for CDP communication
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 */
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public class v138Domains implements Domains {
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    public v138Domains(DevTools devtools); // Validates devtools with Require.nonNull()
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}
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```
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**Usage Example:**
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```java
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import org.openqa.selenium.chrome.ChromeDriver;
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import org.openqa.selenium.devtools.DevTools;
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import org.openqa.selenium.devtools.v138.v138Domains;
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ChromeDriver driver = new ChromeDriver();
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DevTools devTools = driver.getDevTools();
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devTools.createSession();
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// Create domains aggregator
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v138Domains domains = new v138Domains(devTools);
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// Now access individual domains
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domains.events().enableRuntime();
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domains.network().enableNetworkCaching();
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```
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### Events Domain Access
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Provides access to runtime events and console handling capabilities.
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```java { .api }
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/**
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 * Access to runtime events and console handling
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 * @return Events domain implementation for v138
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 */
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@Override
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public Events<?, ?> events();
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```
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### JavaScript Domain Access
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Provides access to JavaScript execution and binding management.
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```java { .api }
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/**
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 * Access to JavaScript execution and binding capabilities
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 * @return Javascript domain implementation for v138
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 */
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@Override
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public Javascript<?, ?> javascript();
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```
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### Network Domain Access
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Provides access to network monitoring and interception capabilities.
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```java { .api }
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/**
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 * Access to network monitoring and interception
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 * @return Network domain implementation for v138
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 */
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@Override
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public Network<?, ?> network();
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```
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### Target Domain Access
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Provides access to target/tab management capabilities.
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```java { .api }
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/**
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 * Access to target/tab management
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 * @return Target domain implementation for v138
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 */
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@Override
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public Target target();
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```
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### Log Domain Access
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Provides access to console logging functionality.
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```java { .api }
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/**
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 * Access to console logging functionality  
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 * @return Log domain implementation for v138
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 */
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@Override
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public Log log();
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```
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## Implementation Details
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The v138Domains class initializes domain instances in its constructor:
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- **v138Events**: Initialized with DevTools connection for runtime event handling
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- **v138Javascript**: Initialized with DevTools connection for script management
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- **v138Log**: Initialized with default constructor (stateless)
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- **v138Network**: Initialized with DevTools connection for network operations
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- **v138Target**: Initialized with default constructor (stateless)
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All domain instances are created eagerly during construction and maintained throughout the domains object lifecycle.