mailpoet_email_editor_theme_json filter-hookWC 1.0

Usage

add_filter( 'mailpoet_email_editor_theme_json', 'wp_kama_mailpoet_email_editor_theme_json_filter' );

/**
 * Function for `mailpoet_email_editor_theme_json` filter-hook.
 * 
 * @param  $theme 
 *
 * @return 
 */
function wp_kama_mailpoet_email_editor_theme_json_filter( $theme ){

	// filter...
	return $theme;
}
$theme
-

Where the hook is called

Theme_Controller::get_base_theme()
mailpoet_email_editor_theme_json
woocommerce/packages/email-editor/src/Engine/class-theme-controller.php 73
return apply_filters( 'mailpoet_email_editor_theme_json', $theme );

Where the hook is used in WooCommerce

woocommerce/packages/email-editor/src/Integrations/Core/class-initializer.php 23
add_filter( 'mailpoet_email_editor_theme_json', array( $this, 'adjust_theme_json' ), 10, 1 );