checkNotNull

function checkNotNull<T>(value: T): asserts value is Exclude<T, null>

Throws an IllegalStateException if the value is null.

function checkNotNull<T>(
  value: T,
  lazyMessage: () => string
): asserts value is Exclude<T, null>

Throws an IllegalStateException with the result of calling lazyMessage if the value is null.

Samples

import { checkNotNull } from 'kotlinic'

checkNotNull(42)
checkNotNull('foo')
checkNotNull(null) // will fail with IllegalStateException