Function ifNotExistsThen

ifNotExistsThen<T>(callback: () => void, value?: T): void
Executes a callback if the value does not exist (is null or undefined)
Type Parameters
- T
  The type of the value
Parameters
- callback: () => void
  The callback function to execute
- Optionalvalue: T
  The value to check (optional)
Returns void
- Defined in foundation/misc/MiscUtil.ts:330