public void FindContainedResource()
{
var cPat1 = new Patient() { Id = "pat1" };
var cPat2 = new Patient() { Id = "pat2" };
var pat = new Patient();
pat.Contained = new List<Resource> { cPat1, cPat2 };
var rref = new ResourceReference() { Reference = "#pat2" };
Assert.IsNotNull(pat.FindContainedResource(rref));
Assert.IsNotNull(pat.FindContainedResource(rref.Url));
rref.Reference = "#pat3";
Assert.IsNull(pat.FindContainedResource(rref));
}