Exclude undesired First Class Mail services on WooForce USPS Plugin

functions.php

	// Exclude the services First-Class Mail Postcards, First-Class Mail Large Envelope and First-Class Mail Stamped Letter
	add_filter('usps_disable_first_class_rate_first-class-mail-postcards', 'disable_first_class_rate_for_this_service',10,3);
	add_filter('usps_disable_first_class_rate_first-class-mail-large-envelope', 'disable_first_class_rate_for_this_service',10,3);
	add_filter('usps_disable_first_class_rate_first-class-mail-stamped-letter', 'disable_first_class_rate_for_this_service',10,3);
	function disable_first_class_rate_for_this_service() {
		return true;
	}
	
	// Include First-Class Mail Parcel ( Default Behaviour)
	add_filter('usps_disable_first_class_rate_first-class-mail-parcel', 'disable_first_class_rate_for_parcel_service',10,3);
	function disable_first_class_rate_for_parcel_service() {
		return false;
	}