protected function get_wp_query_args( $query_vars ) {

		$skipped_values = array( '', array(), null );
		$wp_query_args  = array(
			'errors'     => array(),
			'meta_query' => array(), // phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_query
		);

		foreach ( $query_vars as $key => $value ) {
			if ( in_array( $value, $skipped_values, true ) || 'meta_query' === $key ) {
				continue;
			}

			// Build meta queries out of vars that are stored in internal meta keys.
			if ( in_array( '_' . $key, $this->internal_meta_keys, true ) ) {
				// Check for existing values if wildcard is used.
				if ( '*' === $value ) {
					$wp_query_args['meta_query'][] = array(
						array(
							'key'     => '_' . $key,
							'compare' => 'EXISTS',
						),
						array(
							'key'     => '_' . $key,
							'value'   => '',
							'compare' => '!=',
						),
					);
				} else {
					$wp_query_args['meta_query'][] = array(
						'key'     => '_' . $key,
						'value'   => $value,
						'compare' => is_array( $value ) ? 'IN' : '=',
					);
				}
			} else { // Other vars get mapped to wp_query args or just left alone.
				$key_mapping = array(
					'parent'         => 'post_parent',
					'parent_exclude' => 'post_parent__not_in',
					'exclude'        => 'post__not_in',
					'limit'          => 'posts_per_page',
					'type'           => 'post_type',
					'return'         => 'fields',
				);

				if ( isset( $key_mapping[ $key ] ) ) {
					$wp_query_args[ $key_mapping[ $key ] ] = $value;
				} else {
					$wp_query_args[ $key ] = $value;
				}
			}
		}

		return apply_filters( 'woocommerce_get_wp_query_args', $wp_query_args, $query_vars );
	}