private function validate_helper_input( $helper ) {
		if ( ! is_array( $helper ) || empty( $helper ) ) {
			return false;
		}

		if ( !  isset( $helper[ 'name' ] ) || ! isset( $helper[ 'class' ]  ) ) {
			return false;
		}

		//if not set, set callback name to "helper"
		if ( ! isset( $helper[ 'callback' ] ) ) {
			$helper[ 'callback' ] = 'helper';
		}

		return $helper;

	}