function(dataIndex){
        var view = this.view,
            header = view.headerCt.down('gridcolumn[dataIndex=' + dataIndex + ']'),
            menu = view.headerCt.getMenu();

        return header ? menu.down('menuitem[headerId='+ header.id +']') : null;
    }
function(dataIndex){
        var view = this.view,
            header = view.headerCt.down('gridcolumn[dataIndex=' + dataIndex + ']'),
            menu = view.headerCt.getMenu();

        return header ? menu.down('menuitem[headerId='+ header.id +']') : null;
    }
function ( dataIndex ) { var view = this . view , header = view . headerCt . down ( 'gridcolumn[dataIndex=' + dataIndex + ']' ) , menu = view . headerCt . getMenu ( ) ; return header ? menu . down ( 'menuitem[headerId=' + header . id + ']' ) : null ; }
Gets the related menu item for a dataIndex
@private
@return {Ext.grid.header.Container} The header
Gets the related menu item for a dataIndex