This is unsafe nullable type (T?) conversion to a non-nullable type (T),
!! will throw NullPointerException if the value is null.
It is documented here along with Kotlin means of null-safety.
This is unsafe nullable type (T?) conversion to a non-nullable type (T),
!! will throw NullPointerException if the value is null.
It is documented here along with Kotlin means of null-safety.
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