code: public RecordTypeInfo getNestedStructTypeInfo(String name) {
      StructTypeID stid = sTid.findStruct(name);
      if (null == stid) return null;
      return new RecordTypeInfo(name, stid);
    }
docs: Return the type info of a nested record. We only consider nesting
  to one level.
  @param name Name of the nested record