tcl::tm::path

[new tcl 8.5 command - a pointer to doc and description is needed here]

http://www.purl.org/tcl/home/man/tcl8.5/TclCmd/tm.htm

tcl::tm::path add ?path…?
tcl::tm::path remove ?path…?
tcl::tm::path list

Manipulate and inspect the path of directories searched for Tcl Modules.