{
  "context": "This criteria evaluates how well the engineer uses the google-shopping-merchant-conversions package to perform partial updates on conversion sources using field masks. The focus is on proper usage of field mask operations to update specific fields without affecting others.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "update_conversion_source usage",
      "description": "Uses the update_conversion_source() method from ConversionSourcesServiceClient to update conversion sources",
      "max_score": 20
    },
    {
      "name": "FieldMask construction",
      "description": "Creates FieldMask objects (from google.protobuf.field_mask_pb2 or similar) with appropriate paths to specify which fields to update",
      "max_score": 25
    },
    {
      "name": "update_mask parameter",
      "description": "Passes the field mask to the update request using the update_mask parameter in UpdateConversionSourceRequest",
      "max_score": 20
    },
    {
      "name": "Field path specification",
      "description": "Correctly specifies field paths in the field mask (e.g., 'merchant_center_destination.display_name', 'merchant_center_destination.currency_code') using proper dot notation for nested fields",
      "max_score": 20
    },
    {
      "name": "ConversionSource construction",
      "description": "Constructs ConversionSource objects with MerchantCenterDestination containing the fields to be updated",
      "max_score": 15
    }
  ]
}