code: function ( nButton, oConfig )
  	{
  		var nHidden = document.createElement( this.s.tags.collection.container );
  		nHidden.style.display = "none";
  		nHidden.className = this.classes.collection.container;
  		oConfig._collection = nHidden;
  		document.body.appendChild( nHidden );
  
  		this._fnButtonDefinations( oConfig.aButtons, nHidden );
  	}
docs: /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
  Button collection functions
   
  Create a collection button, when activated will present a drop down list of other buttons
  @param   {Node} nButton Button to use for the collection activation
  @param   {Object} oConfig Button configuration object
  @returns void
  @private