Questions about mapserver C API 'projectionObj_new' replacement

[pw]

Hello,

I am upgrading some mapserver source that is based on mapserver
version 4.2.3 up to the current version 4.10.1.

In my old code I am calling:

projectionObj *pj=projectionObj_new(mapObj_getProjection(..yada..))

The API has now changed and 'projectionObj_new' is no longer available
from what I am seeing.

How has this been replaced and what is the method I should use
to create a projection object using a copy constructor?

Thanks for any insight,

Peter