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action is not described

customize_save_validation_before action-hook . WP 4.6.0

Fires before save validation happens.

Plugins can add just-in-time 'customize_validate_(id)''} filters at this point to catch any settings registered after customize_register. The dynamic portion of the hook name, $this->ID refers to the setting ID.

Usage

add_action( 'customize_save_validation_before', 'action_function_name_1146' );
function action_function_name_1146( $this ){
	// action...
}
$this(WP_Customize_Manager)
WP_Customize_Manager instance.

Where the hook is called

WP_Customize_Manager::save_changeset_post()
wp-includes/class-wp-customize-manager.php 2686
do_action( 'customize_save_validation_before', $this );

Where the hook is used (in WP core)

Does not used.