code: @NonNull
      @Override
      public From from(@NonNull DataSource dataSource) {
          if (dataSource == null) {
              throw new IllegalArgumentException("dataSource cannot be null.");
          }
          return new From(this, dataSource);
      }
docs: Create and chain a FROM component for specifying the data source of the query.
  
  @param dataSource the data source.
  @return the From component.