docs: public final void save(String dirName, String fullName, Set<RegData> hashes) {
          // @Research(if statement).
          if (!Config.X_DEPENDENCIES_SAVE_V) {
              return;
          }
          // Ensure that the directory for coverage exists.
          new File(dirName).mkdirs();
          save(openFileWrite(dirName, fullName, fullName, null), hashes);
      }