codegen-resources/xml/customization.config

{
    "skipEndpointTestGeneration": true,
    "requiredTraitValidationEnabled": true,
    "customSdkShapes": {
      "shapes":{
        "SdkPartType":{
          "type":"string",
          "enum":[
            "DEFAULT",
            "LAST"
          ]
        }
      }
    },
    "shapeModifiers": {
      "AllTypesStructure": {
        "inject": [
          {
            "SdkPartType": {
              "shape": "SdkPartType",
              "documentation": "Indicates whether the request is a last part or not. This field will not be included in the request payload."
            }
          }
        ]
      }
    }
}