public function config() {
		if ( ! empty( $this->struct['config'] ) ) {
			$this->struct['modal']['config'] = array_merge( $this->struct['modal']['config'], $this->struct['config'] );
			if ( ! empty( $this->struct['config']['add_text'] ) ) {
				$this->struct['modal']['config']['footer']['control']['add_item']['label'] = $this->struct['config']['add_text'];
			}
			if ( ! empty( $this->struct['config']['update_text'] ) ) {
				$this->struct['modal']['config']['footer']['control']['update_item']['label'] = $this->struct['config']['update_text'];
			}
			unset( $this->struct['config'] ); // remove so no clashing.
		}
	}