code: public CSVParserBuilder<T, K> usingExplicitHeader(String... header) {
          Objects.requireNonNull(subsetView);
          this.subsetView = FieldSubsetView.forExplicitHeader(subsetView.getFieldSubset(), header);
          return this;
      }
docs: Use supplied header and do not take header from the source.
  @param header - header fields
  @return this parser builder