K4 Opening k-drawer with button

Before k4 my plugin had a <k-button> and <k-drawer> by using @click on the button i managed to open the drawer. That’s not possible anymore. I checked the lab example where the definition of the fields for the drawer is on the open()

			component: 'k-form-drawer',
			props: {
				icon: 'box',
				title: 'Form',
				fields: {
					name: {
						label: 'Name',
						type: 'text',
					email: {
						label: 'Email',
						type: 'email',

I would like to avoid re-writing all drawer fields and. How can i just open my old k-drawer definition?