lib/util.js
function mix (receiver, supplier) {
  for (var key in supplier) {
    receiver[key] = supplier[key];
  }
  return receiver;
}
function mix (receiver, supplier) {
  for (var key in supplier) {
    receiver[key] = supplier[key];
  }
  return receiver;
}
function mix ( receiver , supplier ) { for ( var key in supplier ) { receiver [ key ] = supplier [ key ] ; } return receiver ; }
A very simple `mix` method copy all properties in the supplier to the receiver @param {Object} receiver @param {Object} supplier @returns {mixed} receiver
A very simple mix method copy all properties in the supplier to the receiver