has_response_function() {
        if(!self.function)
            return false;
        return true;
    }
/**
     * Checks if the function has a defined callback function.
     * 
     * @returns True if function has defined callback function, else false.
     */
Checks if the function has a defined callback function.

@returns True if function has defined callback function, else false.
Checks if the function has a defined callback function . @returns True if function has defined callback function else false .
has_response_function() {
        if(!self.function)
            return false;
        return true;
    }
has_response_function ( ) { if ( ! self . function ) return false ; return true ; }
Checks if the function has a defined callback function.
Checks if the function has a defined callback function .