/** Example of a {@link Class} declaration */
final class MyClass {
  private boolean someBool;
  
  public MyClass(boolean someBool) {
    this.someBool = someBool;
  }
  
  public boolean getSomeBool() {
    return someBool;
  }
  
  protected void setSomeBool(@NonNull boolean value) {
    someBool = value;
  }
  
  @Override
  public String toString() {
    return "someBool:" + someBool;
  }
  
  // .copy override
  // .hashcode override
  // .equals override
}

/** Returns a subset of {@code list} containing only the items where {@code someBool == true} */
public List<MyClass> filterList(List<MyClass> list) {
  List<MyClass> ret = new List<>(list.size());
  
  for(MyClass item : list) { 
    if(item.someBool) {
        ret.add(item);
      }
    }
    
  return ret;
}

/** Returns {@code "yes"} if {@code value == true} or {@code "no"} if {@code value == false}. */
public boolean yesOrNo(boolean value) {
  return value ? "yes" : "no";
}