public void FromMember(Expression <Func <TSource, object> > sourceMember)
{
var body = sourceMember.Body as MemberExpression;
if (body != null)
{
_propertyMap.SourceMember = body.Member;
}
var func = sourceMember.Compile();
_propertyMap.ChainTypeMemberForResolver(new DelegateBasedResolver <TSource>(r => func((TSource)r.Value)));
}