code: public InsertIntoTable addRowsFromDelimited(File file, String delimiter, Object nullValue) {
      builder.addRowsFromDelimited(file, delimiter, nullValue);
      return this;
    }
docs: Adds all rows from the TSV file specified, using the provided delimiter and null value.
  
  @param file The file to read the data from.
  @param delimiter A column delimiter.
  @param nullValue Value to be treated as null in the source data.
  @return {@code this}