plainCopy (value) {
    return utils.copy(value, undefined, undefined, undefined, undefined, true)
  }
Return a plain copy of the given value.

@example
import { utils } from 'js-data';
const a = { name: 'John' };
let b = utils.plainCopy(a);
console.log(a === b); // false

@method utils.plainCopy
@param {*} value The value to copy.
@returns {*} Plain copy of `value`.
@see utils.copy
@since 3.0.0