linesOut = append(linesOut, "")

			// #cgo (nocallback|noescape) <function name>
			if fields := strings.Fields(l); len(fields) == 3 {
				directive := fields[1]
				funcName := fields[2]
				if directive == "nocallback" {
					f.NoCallbacks[funcName] = true
				} else if directive == "noescape" {
					f.NoEscapes[funcName] = true
				}
			}
		}
	}
	f.Preamble = strings.Join(linesOut, "\n")
}

// that speaks specifically to how the options fields relate to apply.
message ApplyOptions {
  // When present, indicates that modifications should not be
  // persisted. An invalid or unrecognized dryRun directive will
  // result in an error response and no further processing of the
  // request. Valid values are:
  // - All: all dry run stages will be processed
  // +optional
  repeated string dryRun = 1;

		HTTPStatusCode: http.StatusBadRequest,
	},
	ErrInvalidMetadataDirective: {
		Code:           "InvalidArgument",
		Description:    "Unknown metadata directive.",
		HTTPStatusCode: http.StatusBadRequest,
	},
	ErrInvalidStorageClass: {
		Code:           "InvalidStorageClass",
		Description:    "Invalid storage class.",
		HTTPStatusCode: http.StatusBadRequest,
	},

    characters.
 *  New: Accept a charset in `FormBody.Builder`. Previously form bodies were
    always UTF-8.
 *  New: Support the `immutable` cache-control directive.
 *  Fix: Don't crash when an HTTP/2 call is redirected while the connection is
    being shut down.
 *  Fix: Don't drop headers of healthy streams that raced with `GOAWAY` frames.