docs: @Override
      protected IIOMetadataNode getStandardTransparencyNode() {
          if (header.hasMasks() && header.masks[3] != 0) {
              IIOMetadataNode transparency = new IIOMetadataNode("Transparency");
              IIOMetadataNode alpha = new IIOMetadataNode("Alpha");
              alpha.setAttribute("value", "nonpremultiplied");
              transparency.appendChild(alpha);
  
              return transparency;
          }
  
          return null;
      }