doc (Directive)
directive @doc(
category: String = "Common"
description: String = ""
) on
| FIELD_DEFINITION
| ARGUMENT_DEFINITION
| INPUT_FIELD_DEFINITION
| ENUM_VALUE
directive @doc(
category: String = "Common"
description: String = ""
) on
| FIELD_DEFINITION
| ARGUMENT_DEFINITION
| INPUT_FIELD_DEFINITION
| ENUM_VALUE