template/html/jquery-tablesorter.js
function( table ) {
         var index, $cell,
          c = $( table )[ 0 ].config,
          $headers = c.$table.find( c.selectorHeaders ),
          len = $headers.length;
         // don't use c.$headers here in case header cells were swapped
         for ( index = 0; index < len; index++ ) {
            $cell = $headers.eq( index );
            // only restore header cells if it is wrapped
            // because this is also used by the updateAll method
            if ( $cell.find( '.' + ts.css.headerIn ).length ) {
               $cell.html( c.headerContent[ index ] );
            }
         }
      }
function( table ) {
         var index, $cell,
          c = $( table )[ 0 ].config,
          $headers = c.$table.find( c.selectorHeaders ),
          len = $headers.length;
         // don't use c.$headers here in case header cells were swapped
         for ( index = 0; index < len; index++ ) {
            $cell = $headers.eq( index );
            // only restore header cells if it is wrapped
            // because this is also used by the updateAll method
            if ( $cell.find( '.' + ts.css.headerIn ).length ) {
               $cell.html( c.headerContent[ index ] );
            }
         }
      }
restore headers