public abstract class KnowledgeGraphNamedObjectType : ArcGIS.Core.CoreObjectsBase, System.IDisposable  

//Use GetDocumentEntityTypeName(KnowledgeGraphDataModel kg_dm) from
//the 'Get Whether KG Has a Document Type' snippet to
//get the documentNameType parameter
protected bool HasGeometry(KnowledgeGraphNamedObjectType kg_named_obj)
{
  var props = kg_named_obj.GetProperties();
  return props.Any(prop => prop.FieldType == FieldType.Geometry);
}