arcgis python toolbox, how do i get the geom from a GPFeatureRecordSetLayer after a polygon has been created

[AlanBloor1]

Hi all.

I have a custom python toolbox created in ArcMap 10.5.

I'm using GPFeatureRecordSetLayer to draw a polygon onto a in_memory layer.

I can see a in_memory layer created when I run the tool, there are no errors.

How do I access that layer or in particular, how do I go about accessing the geom in that layer to send to a REST endpoint please?

The parameter looks like:

paramPoly = arcpy.Parameter(

   displayName = "aoi",

   name = "aoi",

   dataType = "GPFeatureRecordSetLayer",

   parameterType = "Required",

   direction = "Input")

paramPoly.value = r"local address to a polygon layer"

thank you very much for any help)