isRecord.js

// @flow
import { Iterable, Map, Seq } from 'immutable';

/**
 * Returns `true` if `subject` is an instance of a Record.
 * 
 * @param {any} subject
 * @return {boolean}
 */
export default function isRecord(subject: any): boolean {
  return (
    Iterable.isKeyed(subject) && !Map.isMap(subject) && !Seq.isSeq(subject)
  );
}