@NotNull @ObjectiveCName("addTrustedKey:") public ConfigurationBuilder addTrustedKey(String trustedKey){
  trustedKeys.add(new TrustedKey(trustedKey));
  return this;
}

@ NotNull @ ObjectiveCName ( "addTrustedKey:" ) public ConfigurationBuilder addTrustedKey ( String trustedKey ) { trustedKeys . add ( new TrustedKey ( trustedKey ) ) ; return this ; }
adding trusted key for protocol encryption securing
