public Task<T> GetFunctionsAsync<T>(
	FunctionGroup group = FunctionGroup.FUNC_GROUP_ALL,
	Func<Response, T> onResult,
	AsyncHandle asyncHandle = null
)

Public Function GetFunctionsAsync(Of T) ( 
	Optional group As FunctionGroup = FunctionGroup.FUNC_GROUP_ALL,
	onResult As Func(Of Response, T),
	Optional asyncHandle As AsyncHandle = Nothing
) As Task(Of T)