How can I hide rows in a VirtualRepeater?

I'm using one VirtualRepeater in Enyo (WebOS 3.0):

{kind: enyo.VirtualRepeater, name: "eventList", onSetupRow: "setupRowWithEvent", onclick: "doListTap", components: [
   {kind: enyo.Item, name:"eventItem", layoutKind: enyo.HFlexLayout, tapHighlight: true, components: [
       /* components of every row: inside a Enyo.Item */       
   ]} 
]}                                 
/* more code */
setupRowWithEvent: function(inSender, inIndex) {
     if (somethingIsTrue) {

         return true;    
     }
 }

What I want to do is:

• if something is true, render the row
• if not, show nothing The problem is that now it's showing empty rows, instead of nothing. It shows rows with content and empty rows, but I want no rows. I can't return false, or the VirtualRepeater will stop rendering rows.

The solution I've found is simple:

{kind: enyo.VirtualRepeater, name: "eventList", onSetupRow: "setupRowWithEvent", onclick: "doListTap", components: [
    {kind: enyo.Item, name:"eventItem", layoutKind: enyo.HFlexLayout, tapHighlight: true, components: [
        /* components of every row: inside a Enyo.Item */       
    ]} 
]}                                 
/* more code */
setupRowWithEvent: function(inSender, inIndex) {
  if (somethingIsTrue) {
      // code to update every row 

  } else {  // we don't want this row to show
      this.$.eventItem.setShowing(false);
  } 
 return true; // if you don't return true, the virtual Repeater stops fetching rows
}