System Helpers:
There are a number of predefine helper available to help your work. A system helper extends a core Module and all functions are define in module class. We can access all those module functions through the helper.
Important: Helper used to overwrite a Module. If we require to edit a function in Module then we create it in helper and extends with it rather then edit.
For example:
class Development_Helper_Validation extends appRain_Base_Modules_Validation
{
}
