static PathNaming defaultNaming() {
    return Path::toStringPath;
  }
Return name of a field (aka {@link Path}) like {@code a.b.c} or {@code _id}.
Should take in consideration {@code ID} naming properties of the backend.
@param path path to be converted to string
@return path representation as string
criteria/common/src/org/immutables/criteria/backend/PathNaming.java