var github.com/golang/protobuf/proto.errNotExtendable

5 uses

	github.com/golang/protobuf/proto (current package)
		extensions.go#L41: var errNotExtendable = errors.New("proto: not an extendable proto.Message")
		extensions.go#L123: 		return nil, errNotExtendable
		extensions.go#L205: 		return nil, errNotExtendable
		extensions.go#L226: 		return errNotExtendable
		extensions.go#L282: 		return nil, errNotExtendable