Add support for rotation on Marker icon

[mrakowRC]

As far as I am aware, the rotation property of the marker icon is not yet supported. Are there any plans to implement this?

[valentasm1]

Do you have js code for this functionality? I dont see this property in marker. https://developers.google.com/maps/documentation/javascript/reference/marker

[mrakowRC]

my mistake i think its for symbols sorry about that