<@U0NA121E3> for instance in `Strings.kt`, this: `...

# announcements

[bod]

@jakon89 for instance in Strings.kt, this:

public inline fun CharSequence?.isNullOrEmpty(): Boolean {
    contract {
        returns(false) implies (this@isNullOrEmpty != null)
    }

    return this == null || this.length == 0
}