Cesium API Sample - KML Parse Timespan

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Relevant Google Earth Source (link)

// Sample KML taken from
                    //   http://code.google.com/apis/kml/documentation/kml_tut.html#polygons
                    var pentagon = ge.parseKml(
                      '<?xml version="1.0" encoding="UTF-8"?>' +
                      '<kml xmlns="http://www.opengis.net/kml/2.2">' +
                      '  <Placemark>' +
                      '    <name>The Pentagon</name>' +
                      '    <Polygon>' +
                      '      <extrude>1</extrude>' +
                      '      <altitudeMode>relativeToGround</altitudeMode>' +
                      '      <outerBoundaryIs>' +
                      '        <LinearRing>' +
                      '          <coordinates>' +
                      '            -77.05788457660967,38.87253259892824,100 ' +
                      '            -77.05465973756702,38.87291016281703,100 ' +
                      '            -77.05315536854791,38.87053267794386,100 ' +
                      '            -77.05552622493516,38.868757801256,100 ' +
                      '            -77.05844056290393,38.86996206506943,100 ' +
                      '            -77.05788457660967,38.87253259892824,100' +
                      '          </coordinates>' +
                      '        </LinearRing>' +
                      '      </outerBoundaryIs>' +
                      '      <innerBoundaryIs>' +
                      '        <LinearRing>' +
                      '          <coordinates>' +
                      '            -77.05668055019126,38.87154239798456,100 ' +
                      '            -77.05542625960818,38.87167890344077,100 ' +
                      '            -77.05485125901024,38.87076535397792,100 ' +
                      '            -77.05577677433152,38.87008686581446,100 ' +
                      '            -77.05691162017543,38.87054446963351,100 ' +
                      '            -77.05668055019126,38.87154239798456,100' +
                      '          </coordinates>' +
                      '        </LinearRing>' +
                      '      </innerBoundaryIs>' +
                      '    </Polygon>' +
                      '  </Placemark>' +
                      '</kml>');

ge.getFeatures().appendChild(pentagon);

// Fly to the Pentagon
                    var la = ge.createLookAt('');
                    la.set(38.867, -77.0565, 500, ge.ALTITUDE_RELATIVE_TO_GROUND, 0, 45, 900);
                    ge.getView().setAbstractView(la);