Add an object to the end of the array
*Usage
  CLASS(FTMutableObjectArray)      :: array
  CLASS(FTObject)        , POINTER :: obj
  CLASS(FTObjectSubclass), POINTER :: p
  obj => p
  CALL array % addObject(obj)
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| class(FTMutableObjectArray) | :: | self | ||||
| class(FTObject), | POINTER | :: | obj |