Element_Type::sanitize_settings_fields()

	protected final function sanitize_settings_fields() {
		$defaults = array(
			'section'     => '',
			'type'        => 'text',
			'label'       => '',
			'description' => '',
			'is_label'    => false,
			'is_choices'  => false,
		);

		$invalid_fields = array();
		$valid_sections = array();

		foreach ( $this->settings_fields as $slug => $field ) {
			if ( empty( $field['section'] ) || ! isset( $this->settings_sections[ $field['section'] ] ) ) {
				/* translators: %s: field section slug */
				$this->manager->error_handler()->doing_it_wrong( get_class( $this ) . '::bootstrap()', sprintf( __( 'Invalid element type field section %s.', 'torro-forms' ), esc_html( $field['section'] ) ), '1.0.0' );
				$invalid_fields[ $slug ] = true;
				continue;
			}

			if ( empty( $field['type'] ) || ! Field_Manager::is_field_type_registered( $field['type'] ) ) {
				/* translators: %s: field type slug */
				$this->manager->error_handler()->doing_it_wrong( get_class( $this ) . '::bootstrap()', sprintf( __( 'Invalid element type field type %s.', 'torro-forms' ), esc_html( $field['type'] ) ), '1.0.0' );
				$invalid_fields[ $slug ] = true;
				continue;
			}

			if ( in_array( $field['type'], array( 'multiselect', 'multibox', 'group' ), true ) || empty( $field['is_choices'] ) && 'torrochoices' === $field['type'] ) {
				/* translators: %s: field type slug */
				$this->manager->error_handler()->doing_it_wrong( get_class( $this ) . '::bootstrap()', sprintf( __( 'Disallowed element type field type %s.', 'torro-forms' ), esc_html( $field['type'] ) ), '1.0.0' );
				$invalid_fields[ $slug ] = true;
				continue;
			}

			if ( ! empty( $field['repeatable'] ) && empty( $field['is_choices'] ) ) {
				/* translators: %s: field type slug */
				$this->manager->error_handler()->doing_it_wrong( get_class( $this ) . '::bootstrap()', __( 'Disallowed repeatable element type field.', 'torro-forms' ), '1.0.0' );
				$invalid_fields[ $slug ] = true;
				continue;
			}

			$valid_sections[ $field['section'] ] = true;
			$this->settings_fields[ $slug ] = array_merge( $defaults, $field );
		}

		$this->settings_fields = array_diff_key( $this->settings_fields, $invalid_fields );
		$this->settings_sections = array_intersect_key( $this->settings_sections, $valid_sections );
	}