The objects for mirror copy are listed in the Copy List of ModelCopy.
The type is a SubCondition of model copy.

Mirror Copy(MirrorCopy)

Property (propName)	Type (Type)	Flag (scriptKeyName)	Description
BoundaryType	Flag	0 or Symmetry 1 or Natural 2 or Extrapolated	The boundary type value The symmetry boundary type The natural boundary type The extrapolated symmetry boundary type
PlaneNormal	Vector		Normal Vector
PlanePoint	Vector		The plane point