Filter for registering field types for WP Travel.

Source

File: /inc/framework/form/class.field.php
Used by: /inc/framework/form/class.field.php

Parameters
$field_types

Example:

function prefix_wp_travel_register_field_types( $field_types ) {
    $field_types['file'] = array(
    'label' => __( 'File', 'wp-travel' ),
    'class' => 'WP_Travel_FW_Field_File',
    );
    return $field_types;
}
add_filter( 'wp_travel_register_field_types', 'prefix_wp_travel_register_field_types' );