Why is this so difficult to do (record set listing)?

if you are looking for this ->

a!localVariables(
  /*/make sure ri!data is notnull*/
  local!fields: a!keys(index(ri!data, 1, "")),
  local!selection,
  local!selectedRows,
  {
    a!gridField(
      label: "Performance Review Schedule",
      labelPosition: "ABOVE",
      data: ri!data,
      columns: {
        a!forEach(
          items: local!fields,
          expression: a!gridColumn(
            label: fv!item,
            value: index(fv!row, fv!item, "")
          )
        )
      },
      pagesize: 10,
      selectable: true,
      selectionValue: local!selection,
      selectionSaveInto: {
        local!selection,
        a!save(
          local!selectedRows,
          append(local!selectedRows, fv!selectedRows)
        ),
        a!save(
          local!selectedRows,
          difference(local!selectedRows, fv!deselectedRows)
        )
      }
    ),
    a!richTextDisplayField(
      labelPosition: "COLLAPSED",
      value: {
        a!richTextItem(
          text: if(
            a!isNullOrEmpty(local!selectedRows),
            "0/" & length(ri!data) & " records selected",
            length(local!selectedRows) & "/" & length(ri!data) & " records selected"
          )
        )
      }
    ),
    a!buttonArrayLayout(
      buttons: {
        a!buttonWidget(
          label: "Delete",
          icon: "trash-solid",
          style: "DESTRUCTIVE",
          disabled: a!isNullOrEmpty(local!selectedRows)/*saveInto: here is logic for delete*/
          
        ),
        a!buttonWidget(
          label: "seprate",
          icon: "code",
          style: "NORMAL",
          /*saveInto: here is logic for seprate*/
          showWhen: not(or(ri!isOnlyDelete)),
          disabled: a!isNullOrEmpty(local!selectedRows)
        )
      },
      align: "START"
    )
  }
)