docs: public void register() {
          synchronized (loaders) {
              loaders.add(this);
  
              maximumHeaderLength = 0;
              for (GVRCompressedTextureLoader loader : loaders) {
                  int headerLength = loader.headerLength();
                  if (headerLength > maximumHeaderLength) {
                      maximumHeaderLength = headerLength;
                  }
              }
          }
      }