Method assertLayout_

src/custom-element.js:425–440

@private

()

    /** @private */
    assertLayout_() {
      if (
        this.layout_ != Layout_Enum.NODISPLAY &&
        this.impl_ &&
        !this.impl_.isLayoutSupported(this.layout_)
      ) {
        userAssert(
          this.getAttribute('layout'),
          'The element did not specify a layout attribute. ' +
            'Check https://amp.dev/documentation/guides-and-tutorials/' +
            'develop/style_and_layout/control_layout and the respective ' +
            'element documentation for details.'
        );
        userAssert(false, `Layout not supported: ${this.layout_}`);
      }
    }

    /**
     * Get the priority to build the element.