public static void removeAll(String namespace){
  if (namespace != null) {
    removeAll(ByteString.copyFromUtf8(namespace));
  }
}

public static void removeAll ( String namespace ) { if ( namespace != null ) { removeAll ( ByteString . copyFromUtf8 ( namespace ) ) ; } }
remove all key - value pairs under a namespace . interprets the provided namespace as utf8 bytes
