Message Title

Using varargs is a bit inefficient so you use overloading to avoid using varargs for the most common cases:

void applyOperation(OperationType operationType) { }
void applyOperation(OperationType operationType, Object operationState) { }
void applyOperation(OperationType operationType, Object operationState, Object operationState) { }
// backup method that is slower
void applyOperation(OperationType operationType, Object operationState, Object operationState, Object... operationState) { }