Group::field_markup()

	public function field_markup() {
		parent::field_markup();

		$checked = true;

		if ( $this->get( 'toggleable' ) ) {
			// Show toggle group if child fields have errors.
			$value   = $this->have_errors() ? 1 : ! empty( array_filter( (array) $this->value() ) );
			$checked = checked( $value, 1, false );

			$this->add_html( '<label for="' . sanitize_html_class( $this->field_name ) . '"><input' . $this->common_attr() . ' ' . $checked . ' type="checkbox" value="1" onchange="AnsPress.Helper.toggleNextClass(this);" />' . esc_html( $this->get( 'toggleable.label', $this->get( 'label' ) ) ) );
			$this->add_html( '</label>' );
		}

		$this->add_html( '<div class="ap-fieldgroup-c' . ( $checked ? ' show' : '' ) . '">' );
		$this->add_html( $this->child->generate_fields() );
		$this->add_html( '</div>' );

		/** This action is documented in lib/form/class-input.php */
		do_action_ref_array( 'ap_after_field_markup', array( &$this ) );
	}