code: public static Builder builder(Reader reader, String tableName) {
          Builder builder = new Builder(reader);
          return builder.tableName(tableName);
      }
docs: This method may cause tablesaw to buffer the entire InputStream.
  
  <p>
  If you have a large amount of data, you can do one of the following:
  1. Use the method taking a File instead of a reader, or
  2. Provide the array of column types as an option. If you provide the columnType array,
  we skip type detection and can avoid reading the entire file