guardNull()
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guardNull()
Guards the value to be .
Code on .
Payload
extends
object
The Payload
generic type variable constrained by indicates the type of optional parameter of the supplied function and optional parameter of the function from which it captures its value.
value: null
The value of type to guard.
callback?: ResultCallback<null, Payload>
payload?: Payload
value is null
The optional callback of type with parameters, the that has been checked, the of this check, and of generic type variable with optional properties from the provided , to handle them before the return. By default, it uses function.
An optional of the generic type variable is assigned to the of the given function.
The return type is a as the result of its statement indicating the is .
The return value is a indicating whether the is .