enable manage stock by default wc vendors pro

functions.php

/* Default value for manage stock = checked */

	add_filter( 'wcv_product_manage_stock', 'change_default_manage_stock' );
	function change_default_manage_stock() {

		$field['post_id'] = $post_id;
		$field['id'] = '_manage_stock';
		$field['wrapper_class'] = 'show_if_simple show_if_variable';
		$field['label'] = __( 'Manage stock?', 'wcvendors-pro' );
		$field['description'] = __( 'Enable stock management at product level', 'wcvendors-pro' );
		$field['type'] = 'checkbox';
		$field['value'] = 'yes'; // This checks the checkbox
		return $field;

}