StyleUrl for GMUPlacemark not matching up with any GMUStyle within the _styles property of GMUGeometryRenderer. #216
Description
I have found that when the below kml document is parsed by GMUKMLParser, the resulting GMUPlacemark object does not have a valid string within the StyleUrl property that references a GMUStyle object. Thus no style is applied to the given placemark despite being set and exported via Google Earth Pro desktop Mac app.
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2" xmlns:gx="http://www.google.com/kml/ext/2.2" xmlns:kml="http://www.opengis.net/kml/2.2" xmlns:atom="http://www.w3.org/2005/Atom">
<Document>
<name>KW Path.kml</name>
<Style id="sn_ylw-pushpin">
<IconStyle>
<scale>1.1</scale>
<Icon>
<href>http://maps.google.com/mapfiles/kml/pushpin/ylw-pushpin.png</href>
</Icon>
<hotSpot x="20" y="2" xunits="pixels" yunits="pixels"/>
</IconStyle>
<LineStyle>
<color>ff00c2ff</color>
<width>2</width>
</LineStyle>
</Style>
<Style id="sh_ylw-pushpin">
<IconStyle>
<scale>1.3</scale>
<Icon>
<href>http://maps.google.com/mapfiles/kml/pushpin/ylw-pushpin.png</href>
</Icon>
<hotSpot x="20" y="2" xunits="pixels" yunits="pixels"/>
</IconStyle>
<LineStyle>
<color>ff00c2ff</color>
<width>2</width>
</LineStyle>
</Style>
<StyleMap id="msn_ylw-pushpin">
<Pair>
<key>normal</key>
<styleUrl>#sn_ylw-pushpin</styleUrl>
</Pair>
<Pair>
<key>highlight</key>
<styleUrl>#sh_ylw-pushpin</styleUrl>
</Pair>
</StyleMap>
<Placemark>
<name>KW Path</name>
<styleUrl>#msn_ylw-pushpin</styleUrl>
<LineString>
<tessellate>1</tessellate>
<coordinates>
-95.40955451587095,29.68319223122121,0 -95.41162049810978,29.68311038759943,0
</coordinates>
</LineString>
</Placemark>
</Document>
</kml>