public static int functionName(
      String stringParam,
      int integerParam,
      double doubleParam,
      float floatParam,
      boolean booleanParam) {
    return 0;
  }
A function (static method) to test fromFunc functionalities.
java-vertexai/google-cloud-vertexai/src/test/java/com/google/cloud/vertexai/generativeai/FunctionDeclarationMakerTest.java