Repeatable::prepare()

	protected function prepare() {
		$this->args = wp_parse_args(
			$this->args,
			array(
				'label' => __( 'AnsPress Repeatable Field', 'anspress-question-answer' ),
			)
		);

		$this->main_fields = $this->args['fields'];
		unset( $this->args['fields'] );

		$value_count       = ! empty( $this->value() ) ? count( $this->value() ) : $this->get_groups_count() + 1;
		$this->total_items = $value_count > 0 ? $value_count : 1;

		$new_fields = array();

		$i = 0;
		while ( $this->total_items > $i ) {
			++$i;

			$this->args['fields'][ $i ] = array(
				'label'         => $this->get( 'label' ) . ' #' . number_format_i18n( $i ),
				'fields'        => $this->main_fields,
				'type'          => 'group',
				'delete_button' => true,
			);
		}

		$this->child = new Form( $this->form_name, $this->args );
		$this->child->prepare();

		// Call parent prepare().
		parent::prepare();

		// Make sure all text field are sanitized.
		$this->sanitize_cb = array_merge( array( 'array_remove_empty' ), $this->sanitize_cb );
	}