code: public void autoMap(final Datastore datastore) {
          setDatastore(datastore);
          try (DatastoreConnection con = datastore.openConnection()) {
              final SchemaNavigator schemaNavigator = con.getSchemaNavigator();
              for (final Entry<String, Column> entry : _map.entrySet()) {
                  if (entry.getValue() == null) {
                      final String path = entry.getKey();
                      final Column column = schemaNavigator.convertToColumn(path);
                      entry.setValue(column);
                  }
              }
          }
      }
docs: Automatically maps all unmapped paths by looking them up in a datastore.
  
  @param schemaNavigator