How to use the testcafe.t.wait function in testcafe

async click_toolbar_button(text) {
		let button_text, dropdown_item;

		if (text.includes(':')) {
			[button_text, dropdown_item] = text.split(":")
		} else {
			button_text = text;
		}

		await this.click_element('.form-inner-toolbar .btn', button_text);

		if (dropdown_item) {
			await t.wait(1000);
			await t.click_dropdown_item(dropdown_item)
		}
	},

async wait_for_modal() {
		await Selector("body.modal-open");
		await t.wait(1000);
	},

async pause(time = 1) {
		await t.wait(time * 1000);
	},

async close_dialog() {
		await ClientFunction(() => {
			cur_dialog && cur_dialog.cancel();
		})();
		await t.wait(500);
	},