code: public static int getDatabaseVersion() {
          Integer databaseVersion = getMetaDataInteger(METADATA_VERSION);
  
          if ((databaseVersion == null) || (databaseVersion == 0)) {
              databaseVersion = 1;
          }
  
          return databaseVersion;
      }
docs: Grabs the database version from the manifest.
  
  @return the database version as specified by the {@link #METADATA_VERSION} version or 1 of
  not present