code: public static BPMUpdate readFile(final InstallFile _installFile)
      {
          final BPMUpdate ret = new BPMUpdate(_installFile);
          final BPMDefinition definition = ret.new BPMDefinition(_installFile);
          ret.addDefinition(definition);
          return ret;
      }
docs: Read the file.
  
  @param _installFile the install file
  @return CSSUpdate