Readding the check.

Author: GearsAD

src/DistributedFactorGraphs.jl

@@ -290,11 +290,11 @@ function __init__()
         @reexport using .DFGPlots
     end
 
-    # if get(ENV, "DFG_USE_CGDFG", "") == "true"
+    if get(ENV, "DFG_USE_CGDFG", "") == "true"
         @info "Detected ENV[\"DFG_USE_CGDFG\"]: Including optional CloudGraphsDFG (LGPL) Driver"
         Base.include(DistributedFactorGraphs, joinpath(@__DIR__, "CloudGraphsDFG/CloudGraphsDFG.jl"))
         @eval DistributedFactorGraphs @reexport using .CloudGraphsDFGs
-    # end
+    end
 end