How to use the @ui5/webcomponents-base/src/events/PseudoEvents.js.isSpace function in @ui5/webcomponents-base

onkeydown(event) {
		if (isEscape(event)) {
			return this._handleEscape(event);
		}

		if (isSpace(event)) {
			event.preventDefault();
		}
	}

onkeyup(event) {
		if (isSpace(event) && this.__spaceDown) {
			this.fireEvent("press");
			this.__spaceDown = false;
		}
	}

onkeyup(event) {
		const headerUsed = this._headerOnTarget(event.ui5target);

		if (isSpace(event) && headerUsed) {
			this._toggleOpen();
		}
	}

onkeydown(event) {
		if (isSpace(event)) {
			event.preventDefault();
			this.__spaceDown = true;
		} else if (isEnter(event)) {
			this.onclick(event);
		}
	}

onkeydown(event) {
		const headerUsed = this._headerOnTarget(event.ui5target);

		if (isEnter(event) && headerUsed) {
			this._toggleOpen();
		}

		if (isSpace(event) && headerUsed) {
			event.preventDefault();
		}
	}

_keydown(event) {
		const isBS = isBackSpace(event);
		const isD = isDelete(event);

		if (!this.readonly && (isBS || isD)) {
			event.preventDefault();

			this.fireEvent("delete", {
				backSpace: isBS,
				"delete": isD,
			});
		}

		if (isEnter(event) || isSpace(event)) {
			this.fireEvent("select", {});
		}
	}