```julia
include(joinpath(Pkg.dir("Gadfly"), "src/Gadfly.jl"))
importall Gadfly```

Make import of Gadfly conditional
user
```julia
if Pkg.installed("Gadfly") != nothing
	include(joinpath(Pkg.dir("Gadfly"), "src/Gadfly.jl"))
	importall Gadfly
end
```
assistant