`analyse_axjoin_categorical` not defined

using YAXArrays, NetCDF

test = YAXArrays.Datasets.open_mfdataset("/Net/Groups/BGI/people/dpabon/*.nc")

Produce:

ERROR: UndefVarError: `analyse_axjoin_categorical` not defined
Stacktrace:

create_mergedict(dimvallist::Dict{Symbol, Vector}) at [/Net/Groups/BGI/people/dpabon/bin/julia_packages/packages/YAXArrays/FFQe6/src/DatasetAPI/Datasets.jl](vscode-file://vscode-app/usr/share/code/resources/app/out/vs/code/electron-sandbox/workbench/workbench.html)

merge_datasets(dslist::Vector{Dataset}) at [/Net/Groups/BGI/people/dpabon/bin/julia_packages/packages/YAXArrays/FFQe6/src/DatasetAPI/Datasets.jl](vscode-file://vscode-app/usr/share/code/resources/app/out/vs/code/electron-sandbox/workbench/workbench.html)

#open_mfdataset#51 at [/Net/Groups/BGI/people/dpabon/bin/julia_packages/packages/YAXArrays/FFQe6/src/DatasetAPI/Datasets.jl](vscode-file://vscode-app/usr/share/code/resources/app/out/vs/code/electron-sandbox/workbench/workbench.html)

open_mfdataset at [/Net/Groups/BGI/people/dpabon/bin/julia_packages/packages/YAXArrays/FFQe6/src/DatasetAPI/Datasets.jl](vscode-file://vscode-app/usr/share/code/resources/app/out/vs/code/electron-sandbox/workbench/workbench.html)

#open_mfdataset#50 at [/Net/Groups/BGI/people/dpabon/bin/julia_packages/packages/YAXArrays/FFQe6/src/DatasetAPI/Datasets.jl](vscode-file://vscode-app/usr/share/code/resources/app/out/vs/code/electron-sandbox/workbench/workbench.html)

open_mfdataset(g::String) at [/Net/Groups/BGI/people/dpabon/bin/julia_packages/packages/YAXArrays/FFQe6/src/DatasetAPI/Datasets.jl](vscode-file://vscode-app/usr/share/code/resources/app/out/vs/code/electron-sandbox/workbench/workbench.html)

top-level scope at [/Net/Groups/BGI/work_3/OEMC/oemc_towers/bin/bug_openmf.jl](vscode-file://vscode-app/usr/share/code/resources/app/out/vs/code/electron-sandbox/workbench/workbench.html)

I went through the code and really analyse_axjoin_categorical is not defined.

Reproduce the failure with the Julia snippet using YAXArrays.Datasets.open_mfdataset. Start in DatasetAPI/Datasets.jl at create_mergedict and follow its call from merge_datasets to determine why analyse_axjoin_categorical is unavailable. Done means the example no longer raises UndefVarError and the relevant behavior is covered by a regression test.