docs: public @CheckForNull
      TypeQualifierAnnotation getEffectiveTypeQualifierAnnotation() {
          boolean firstPartialResult = true;
          TypeQualifierAnnotation effective = null;
  
          for (PartialResult partialResult : partialResultList) {
              if (firstPartialResult) {
                  effective = partialResult.getTypeQualifierAnnotation();
                  firstPartialResult = false;
              } else {
                  effective = combine(effective, partialResult.getTypeQualifierAnnotation());
              }
          }
  
          return effective;
      }