docs: public ImageryMetaDataResource initMetaData() {
          if (!mImageryData.m_isInitialised) {
              synchronized (this) {
                  if (!mImageryData.m_isInitialised) {
                      final ImageryMetaDataResource imageryData = getMetaData();
                      if (imageryData != null) {
                          mImageryData = imageryData;
                          updateBaseUrl();
                      }
                  }
              }
          }
          return mImageryData;
      }