<lightning:datatable aura:id="adviserTable" class="adviserTable"
                        columns="{!v.memberColumns}" data="{!v.memberDataDisplayed}"
                        keyField="planMemberId" onsort="{!c.updateColumnSorting}"
                        sortedBy="{!v.sortedBy}" sortedDirection="{!v.sortedDirection}"
                        onrowaction="{!c.handleRowAction}" enableInfiniteLoading="{!v.enableInfiniteLoading}"
                        onloadmore="{!c.loadMoreMembers}" onsave="{!c.handleSave}"
                        hideCheckboxColumn="true" showRowNumberColumn="true">
</lightning:datatable>

handleSave: function(cmp, event, helper) {
    // call to empty helper function that currently does nothing, but will have server side call to persist changes
    helper.updateEditedValues(event.getParams('draftValues'));

},