Fixing ugly Java APIs: read-only generic varargs - Christophe Beyls - Medium
To sum it up, as soon as you want to put generic types in a Java array, you're on your own to guarantee the safety of your code and to prevent a ClassCastException from occurring at runtime. This is why collections should be preferred to arrays when dealing with generic types in Java. Changing the method signature to use a List<T> instead of T... would avoid compiler warnings and guarantee type safety at compile time:
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