An object with an empty Transformations list indicates the "Do not transform" case, where a pair of coordinate systems
is deliberately configured so that no coordinate transformation occurs during projection.
var cimMapDefinition = MapView.Active.Map.GetDefinition();
// use if map's sr does not have a vertical coordinate system
var datumTransformations = cimMapDefinition.DatumTransforms;
// use if map's sr has a vertical coordinate system
var hvDatumTransformations = cimMapDefinition.HVDatumTransforms;