docs: function (containerGuid, relativePath) {
                      var usedDiff, path, containerDiff, baseGuids, i, baseDiff, dataKnownInExtension;
  
                      containerDiff = getNodeByGuid(diffExtension, containerGuid);
                      if (containerDiff === null) {
                          containerDiff = getNodeByGuid(diffBase, containerGuid);
                          usedDiff = diffBase;
                          path = getPathOfGuid(usedDiff, containerGuid);
                      } else {
                          dataKnownInExtension = true;
                          usedDiff = diffExtension;
                          path = getPathOfGuid(usedDiff, containerGuid);
                      }
  
                      baseGuids = Object.keys(containerDiff.oBaseGuids || {})
                          .concat(Object.keys(containerDiff.ooBaseGuids || {}));
  
                      for (i = 0; i < baseGuids.length; i += 1) {
                          baseDiff = getPathOfDiff(getNodeByGuid(diffExtension, baseGuids[i]) || {}, relativePath);
                          if (baseDiff.removed === false || typeof baseDiff.movedFrom === 'string') {
                              //the base exists / changed and new at the given path
                              return true;
                          }
                      }
  
                      if (dataKnownInExtension &&
                          containerDiff.pointer &&
                          typeof containerDiff.pointer.base === 'string') {
                          // the container changed its base
                          return true;
                      }
                      //this parent was fine, so let's go to the next one - except the root, that we do not have to check
                      relativePath = CONSTANTS.PATH_SEP + getRelidFromPath(path) + relativePath;
                      if (getParentPath(path)) {
                          // we should stop before the ROOT
                          return checkContainer(getParentGuid(diffExtension, path), relativePath);
                      }
  
                      return false;
                  }