public void TestPath()
{
Assert.Equal("Patient", patient.PathString());
Assert.Equal("Patient.active[0]", patient.Children[0].PathString());
Assert.Equal("Patient.active[0].id[0]", patient.Children[0].Children[0].PathString());
Assert.Equal("Patient.active[0].id[1]", patient.Children[0].Children[1].PathString());
Assert.Equal("Patient.active[0].extension[0].value[0]", patient.Children[0].Children[2].Children[0].PathString());
Assert.Equal("Patient.active[0].extension[1].value[0]", patient.Children[0].Children[3].Children[0].PathString());
}