Overrides::filter_fallback_image()

	public function filter_fallback_image() {
		$url    = bigcommerce()->container()[ Assets::PATH ] . '/img/public/';
		$srcset = [
			esc_url( $url . 'bc-product-placeholder--large.jpg' ) . ' 600w',
			esc_url( $url . 'bc-product-placeholder--medium.jpg' ) . ' 370w',
			esc_url( $url . 'bc-product-placeholder--small.jpg' ) . ' 270w',
		];

		return sprintf(
			'<amp-img src="%s" srcset="%s" alt="%s" class="bc-product-placeholder-image" sizes="(max-width: 370px) 85vw, 370px, (max-width: 1200px) 600px" layout="intrinsic" height="370" width="370" />',
			esc_url( $url . 'bc-product-placeholder--medium.jpg' ),
			implode( ', ', $srcset ),
			esc_attr( __( 'product placeholder image', 'bigcommerce' ) )
		);
	}