@Override
  public boolean equals(Object obj) {
    if (this == obj) {
      return true;
    }
    if (!(obj instanceof TestFunction)) {
      return false;
    }
    TestFunction function = (TestFunction) obj;
    return props.equals(function.getConfig());
  }
Get the function identifier, used by clients to invoke this function

@return an object identifying this function
@since GemFire 5.8Beta
geode-dunit/src/main/java/org/apache/geode/internal/cache/functions/TestFunction.java