containsKey

fun <K> <ERROR CLASS><Map<out K, *>>.containsKey(key: K): <ERROR CLASS>
Deprecated: Switch from Assert to Expect; will be removed with 1.0.0

Makes the assertion that the Assert.subject contains the given key.

AssertionError - Might throw an AssertionError if the assertion made is not correct.

Return
This plant to support a fluent API.