src/Out.js
function copyOf(o) {
  if (Array.isArray(o)) return o.slice();
  if (isObject(o)) return assign({}, o);
  return o;
}
function copyOf(o) {
  if (Array.isArray(o)) return o.slice();
  if (isObject(o)) return assign({}, o);
  return o;
}
function copyOf ( o ) { if ( Array . isArray ( o ) ) return o . slice ( ) ; if ( isObject ( o ) ) return assign ( { } , o ) ; return o ; }
Make a copy of something.
Make a copy of something .