kubernetes/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_httpbodyproto.go

// SetHTTPBodyMarshaler overwrite the default marshaler with the HTTPBodyMarshaler
func SetHTTPBodyMarshaler(serveMux *ServeMux) { … }

type HTTPBodyMarshaler …

// ContentType implementation to keep backwards compatibility with marshal interface
func (h *HTTPBodyMarshaler) ContentType() string { … }

// ContentTypeFromMessage in case v is a google.api.HttpBody message it returns
// its specified content type otherwise fall back to the default Marshaler.
func (h *HTTPBodyMarshaler) ContentTypeFromMessage(v interface{ … }

// Marshal marshals "v" by returning the body bytes if v is a
// google.api.HttpBody message, otherwise it falls back to the default Marshaler.
func (h *HTTPBodyMarshaler) Marshal(v interface{ … }