const google.golang.org/protobuf/internal/genid.FieldDescriptorProto_JsonName_field_fullname

one use

	google.golang.org/protobuf/internal/genid (current package)
		descriptor_gen.go#L220: 	FieldDescriptorProto_JsonName_field_fullname       protoreflect.FullName = "google.protobuf.FieldDescriptorProto.json_name"