code: public void setDatabaseAPI(DatabaseAPI databaseAPI) {
          this.sqlGenerator = null;
          if (databaseAPI == null) {
              databaseAPI = DatabaseAPI.DRIVERMANAGER;
          }
          this.databaseAPI = databaseAPI;
      }
docs: Configures which Java database API to use ({@link java.sql.DriverManager}
  or {@link javax.sql.DataSource}. If <code>null</code>, the default is
  assigned ({@link DatabaseAPI.DRIVERMANAGER}).
  
  @param databaseAPI a {@link DatabaseAPI}.