ArchGDAL.Feature unable to be shown in Pluto

[finnhambly]

When layer = ArchGDAL.getlayer(dataset, 0) is called in a single-line Pluto cell (or at the end of a multi-line Pluto cell), the following error is thrown:

Failed to show value:
MethodError: no method matching length(::ArchGDAL.Feature)
Closest candidates are:
length(!Matched::Union{Base.KeySet, Base.ValueIterator}) at /Applications/Julia-1.7.app/Contents/Resources/julia/share/julia/base/abstractdict.jl:58
length(!Matched::Union{Tables.AbstractColumns, Tables.AbstractRow}) at ~/.julia/packages/Tables/M26tI/src/Tables.jl:175
length(!Matched::Union{DataStructures.OrderedRobinDict, DataStructures.RobinDict}) at ~/.julia/packages/DataStructures/vSp4s/src/ordered_robin_dict.jl:86
...
1. table_data(::ArchGDAL.IFeatureLayer, ::IOContext{IOBuffer})@PlutoRunner.jl:1359
2. show_richest(::IOContext{IOBuffer}, ::Any)@PlutoRunner.jl:1004
3. var"#sprint_withreturned#54"(::IOContext{Base.DevNull}, ::Int64, ::typeof(Main.PlutoRunner.sprint_withreturned), ::Function, ::ArchGDAL.IFeatureLayer)@PlutoRunner.jl:954
4. format_output_default(::Any, ::Any)@PlutoRunner.jl:862
5. var"#format_output#42"(::IOContext{Base.DevNull}, ::typeof(Main.PlutoRunner.format_output), ::Any)@PlutoRunner.jl:879
6. formatted_result_of(::Base.UUID, ::Bool, ::Vector{String}, ::Nothing, ::Module)@PlutoRunner.jl:785
7. top-level scope@none:1

Looks like a new method for length should be created, or perhaps the returned value type ought to be changed.

Related: JuliaGeo/Shapefile.jl#50

As pointed out by @felixcremer on the Slack channel, this error can be worked around with layer |> DisplayAs.Text. Otherwise, the output can be suppressed entirely with ;.

[yeesian]

Thank you for filing this; as a feature has both fields and geometries, it is unclear what the "length" of a feature should correspond to, and what it means to be iterating over it, so I'm not ready to support it yet -- happy to have a discussion around it if that's helpful