nsplugin module files are not in /

[yiruli ccsl carleton ca]

nsplugin.pp is loaded in my machines.

But I can not find the three module files--nsplugin.if, nsplugin.te,  
and nsplugin.fc?

Should not they be in the directory  
/serefpolicy-3.3.1/policy/modules/apps of the src.rpm package?

thanks a lot.
Yiru