Method begin

modules/io/firmata/firmataclient.js:668–678

(x, y, width, height)

		}
	}
	begin(x, y, width, height) {
		if (undefined === x)
			x = 0;
		if (undefined === y)
			y = 0;
		if (undefined === width)
			width = this.width - x;
		if (undefined === height)
			height = this.height - y;
		this.#firmata.doPocoBegin(x, y, width, height);
	}
	end() {
		this.#firmata.doPocoEnd();
	}