function extend$1 (to, _from) {
  for (var key in _from) {
    to[key] = _from[key];
  }
  return to
}
function extend$1 (to, _from) {
  for (var key in _from) {
    to[key] = _from[key];
  }
  return to
}
function extend$1 ( to , _from ) { for ( var key in _from ) { to [ key ] = _from [ key ] ; } return to }
Mix properties into target object.
Mix properties into target object .
Extend the given object with the properties from _from.