Hi,
There is FeatureLayerDetails.types property to get subtypes for the layer.
If the FeatureLayer is created from MapServer's layer (with geodatabase subtypes specified), the FeatureLayerDetails.types property is null.
If the FeatureLayer is created from FeatureServer's layer (the same layer with subtypes), the FeatureLayerDetails.types property contains types of the layer's symbology categories and not the geodatabase subtypes.
How to get the geodatabase subtypes for the layer in ArcGIS Flex API?
Thanks,
Matej