[Freeswitch-users] uuid_getvar / uuid_setvar Safety

Hey all, This should hopefully be a very simple question. If I have a variable in one channel that I want to copy to another (these are unrelated, un-bridged channels) is it safe to just do, for example uuid_setvar some_var ${uuid_getvar other-call-id some_var} (from the dialplan)? Is there a better alternative? Without being an expert in how the variable expansion works, I want to make sure this would work for all possible values of the var, and I won't be caught off-guard with buffer size issues, separator issues, etc. Thanks in advance, Colin