code: function( context, args ) {
  				if ( stack ) {
  					if ( firing ) {
  						if ( !flags.once ) {
  							stack.push( [ context, args ] );
  						}
  					} else if ( !( flags.once && memory ) ) {
  						fire( context, args );
  					}
  				}
  				return this;
  			}
docs: Call all callbacks with the given context and arguments