get
Returns this's cause, cast to X.
Prefer this method instead of manually casting an exception's cause. For example, (e as IOException).getCause() throws a ClassCastException that discards the original exception e if the cause is not an IOException, but e.getCauseAs<IOException>() keeps e as the ClassCastException's cause.
See also
Throws
if the cause cannot be cast to the expected type. The ClassCastException's cause is this.