Warning for GMLFormat

[newptcai]

When using GMLFormat, the following warning is given.

┌ Warning: `GraphIO.GMLFormat`  has been moved to submodule `GraphIO.GML` and needs `ParserCombinator.jl` to be imported first. I.e. use
│     using ParserCombinator
│     GraphIO.GML.GMLFormat()
│   caller = searchall(::NWNGSearchConfig, ::String) at SearchWeakly.jl:333
└ @ SearchWeakly ~/Dropbox/Research/2020/Lena/SearchWeakly/src/SearchWeakly.jl:333

However, if you try

import ParserCombinator
using GraphIO: GML

you will see GML is not defined.