docs: public static StringBuilder appendProblems(Object object, StringBuilder builder) {
          if (object instanceof CompilationProblem[]) {
              final CompilationProblem[] problem = (CompilationProblem[]) object;
              for (CompilationProblem aProblem : problem) {
                  builder.append("\t")
                         .append(aProblem)
                         .append("\n");
              }
          } else if (object != null) {
              builder.append(object);
          }
          return builder;
      }