code: function(spirit) {
  		var incoming = this._spirits.incoming;
  		if (incoming.length) {
  			var i = incoming.indexOf(spirit);
  			if (i > -1) {
  				gui.Array.remove(incoming, i);
  			}
  		}
  	}
docs: TODO: Move to {gui.Guide}
  @param {gui.Spirit} spirit