Transform control my own scripted helper

I scripted my own helper object and now try to control vertexes position when transform changed.
Try to use inside with "getDisplayMesh do ... " meshop.getVert theMesh 1 - but have coordinates in local coordsys.
theMesh.transform - is error Unknown property: "transform" in TriMesh ...

is any way to control and modify vertexes coordinates inside helper creation script?

Thank You