Returns flagData for a piece of content for a given user. 

This method can be accessed through the Flagging.asmx file located in:

~/Workarea/webservices/WebServiceAPI/Community/Flag.asmx

[SoapHeader("AuthHeader")]
[SoapHeader("RequestInfoHeader")]
[WebMethod(MessageName = "GetContentFlagData", Description = "gets flagged data using user or visitor id")]
public ContentFlagData GetContentFlagData(long contentId, long userId, String visitorId);

<SoapHeader("AuthHeader")>
<SoapHeader("RequestInfoHeader")>
<WebMethod(MessageName = "GetContentFlagData", Description = "gets flagged data using user or visitor id")>
Public Function GetContentFlagData(contentId As long, userId As long, visitorId As String) As ContentFlagData