code: public static String getFullyQualifiedFunctionImportName(EdmFunctionImport functionImportAnnotation,
                                                               Class<?> functionImportClass) {
          String name = getTypeName(functionImportAnnotation, functionImportClass);
          String namespace = getNamespace(functionImportAnnotation, functionImportClass);
          return namespace + "." + name;
      }
docs: Returns fully qualified function import name by function import annotation and class.
  @param functionImportAnnotation    function import annotation
  @param functionImportClass         function import class
  @return                            fully qualified function import name