Function callOrGet

callOrGet<T>(value): T
If value is a function then it is called, otherwise the value is returned as is.
Type Parameters
- T
  The returned value.
Parameters
- value: T | (() => T)
  The value to return or a callback to call.
Returns T
The value or the call result.
callOrGet<T, A>(value, arg): T
If value is a function then it is called with the given argument, otherwise the value is returned as is.
Type Parameters
- T
  The returned value.
- A
  The value callback argument.
Parameters
- value: T | ((arg) => T)
  The value to return or a callback to call.
- arg: A
  The of argument to pass to the value callback.
Returns T
The value or the call result.