unlift.java

// AVOID:
CompletableFuture<T> method(CompletableFuture<S> param);
// PREFER: 
T method(S param);

// AVOID:
List<T> method(List<S> param);
// PREFER:
T method(S param);

// AVOID: 
T method(A param1, B param2, Optional<C> param3);
// PREFER:
T method(A param1, B param2, C param3);
T method(A param1, B param2);
// This method is clearly doing two things, it should be two methods
// The same is true for boolean parameters