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function is not described

WC_Product::is_virtual() public WC 1.0

Checks if a product is virtual (has no shipping).

{} It's a method of the class: WC_Product{}

Hooks from the method
Return

true|false.

Usage

$WC_Product = new WC_Product();
$WC_Product->is_virtual();

Code of WC_Product::is_virtual() WC 5.5.2

<?php
public function is_virtual() {
	return apply_filters( 'woocommerce_is_virtual', true === $this->get_virtual(), $this );
}