How to hide navigation control in geomap in sap ui5?

Hi,

Can you please let me know on how to hide navigation control in geomap in sap ui5?

Actually I tried below method in my controller in onAfterRendering: function()

var geomap = this.byId("vbi");

geomap.setNavcontrolVisible("false");

But I am getting below exception.

Uncaught TypeError: geomap.setNavcontrolVisible is not a function

Below are the sample code in my view file.

<core:View xmlns:core="sap.ui.core" xmlns:mvc="sap.ui.core.mvc" xmlns="sap.suite.ui.commons" xmlns:ui="sap.suite.ui.commons" xmlns:vbm="sap.ui.vbm"

  controllerName="dashboard6.Page" xmlns:html="http://www.w3.org/1999/xhtml">

<vbm:GeoMap id="vbi" width="100%" height="100%" Navcontrol="false" initialPosition="72.8258;18.9750;0" initialZoom="15" scaleVisible="false" render="render" zoom="zoom" submit="open" openWindow="open">

  <vbm:vos>

  <vbm:Spots spots="{/Spots}" >

  <vbm:Spot  position="{pos}" tooltip="{tooltip}" text="2" image="{pin}" />

  </vbm:Spots>

  <!-- <vbm:Spots spots="{/OtherSpots}" >

  <vbm:Spot position="{pos}" tooltip="{tooltip}"/>

  </vbm:Spots> -->

  </vbm:vos>

  </vbm:GeoMap>

Please let me know is there any property like this Navcontrol="false"

Regards,

Chandru.