public static @NonNull
    <T> T checkNotNull(final T reference) {
        if (reference == null) {
            throw new NullPointerException();
        }
        return reference;
    }
Ensures that an object reference passed as a parameter to the calling
method is not null.

@param reference an object reference
@return the non-null reference that was validated
@throws NullPointerException if {@code reference} is null
android/android_framework/base/src/main/java/github/tornaco/android/thanos/core/util/Preconditions.java