How to use the @shopgate/pwa-common-commerce/product/selectors/page.isProductPageLoading function in @shopgate/pwa-common-commerce

const mapStateToProps = (state, props) => ({
  disabled: !isProductOrderable(state, props) && !hasProductVariants(state, props),
  loading: isProductPageLoading(state, props),
});

const mapStateToProps = (state, props) => ({
  /**
   * 1. Product has no variants and not orderable
   * 2. Parent product can be not orderable but having orderable variants
   */
  disabled: !isProductOrderable(state, props) && !hasProductVariants(state, props),
  loading: isProductPageLoading(state, props),
});

const mapStateToProps = state => ({
  isLoading: isProductPageLoading(state),
  cartProductCount: getCartProductDisplayCount(state),
});

const mapStateToProps = state => ({
  isLoading: isProductPageLoading(state),
  isOrderable: isProductPageOrderable(state),
  cartProductCount: selectActionCount(state),
});

const mapStateToProps = state => ({
  isLoading: isProductPageLoading(state),
  isOrderable: isProductPageOrderable(state),
  isDisabled: !isProductOrderable(state) && !hasCurrentProductVariants(state),
  isVisible: isVisible(state),
  cartProductCount: selectActionCount(state),
});