public CSV header(List<String> items) {
      this.header = items;
      if (header != null && header.size() > 0) {
         this.hasHeader = true;
      }
      return this;
   }
public CSV header ( List < String > items ) { this . header = items ; if ( header != null && header . size ( ) > 0 ) { this . hasHeader = true ; } return this ; }
Specifies the names of the items in the CSV header.

@param items the names of the columns (i.e. header names)
@return the csv builder