load(
  local!pagingInfo:a!pagingInfo(1,100, a!sortInfo("name",1)),
  local!folderContent:{
    {name:"Paul", lastModified: "12 June 2016"},
    {name:"Gene", lastModified: "13 April 2015"}
  },
with(
    /* Need to tie your data with a paging info using todatasubset */
  local!folderdocs: todatasubset(local!folderContent, local!pagingInfo),
  
a!sectionLayout(
  label: "Attachments",
  firstColumnContents: {
a!gridField(
  label:"",
  totalCount: local!folderdocs.totalCount,
  columns: 
    {  
      a!gridTextColumn(
        label: "Name",
        /*need to insert field for each grid text column you want sortable so 
        Appian knows what field to sort on*/
        field: "name",
				data: index(local!folderdocs.data, "name", {}),
        alignment: "LEFT"
    ),
    	a!gridTextColumn(
          label: "Modified Date",
          /*need to insert field for each grid text column you want sortable so 
        Appian knows what field to sort on*/
        field: "lastModified",
          data: index(local!folderdocs.data, "lastModified", {}), 
          alignment: "LEFT"
    )
    },
    /*When you click a grid header to sort, the pagingInfo sortInfo will be updated here*/
  value:local!pagingInfo,
  saveInto:local!pagingInfo
)
}
)
)
)