@NotNull
    String toLine() {
      final StringBuilder lineBuilder = new StringBuilder();

      lineBuilder.append(name).append(" id: ").append(id);
      if (source != null) {
        lineBuilder.append(" super: ").append(superClass.id);

        if (!interfaces.isEmpty()) {
          lineBuilder.append(" interfaces:");
          for (ClassInfo anInterface : interfaces) {
            lineBuilder.append(" ").append(anInterface.id);
          }
        }

        lineBuilder.append(" source: ").append(source);
      }

      return lineBuilder.toString();
    }
@NotNull
    String toLine()