code: public static String getFullyQualifiedFunctionName(EdmFunction functionAnnotation, Class<?> functionClass) {
          String name = getTypeName(functionAnnotation, functionClass);
          String namespace = getNamespace(functionAnnotation, functionClass);
          return namespace + "." + name;
      }
docs: Returned fully qualified function name using function annotation and class.
  @param functionAnnotation    function annotation
  @param functionClass         function class
  @return                      fully qualified function name