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Still have to add tests for this PR.

Just wanted to post this early, so I could get some feedback if anyone sees any issue with this approach. Works fine for us in production.

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My PR includes unit or integration tests for all changed/updated/fixed behaviors

Sadly there wasn't a test of the Java implementation so far, and I don't know yet how to best add one. Any pointers would be appreciated.

Not sure what happened to build-ipas+drive-examples. As this didn't change anything on iOS it should pass just like on master before.

@collinjackson Can you have a look here please if what we're doing is OK?

We've been running in production with this and it's working fine for us, not the lists are available via Google Tag Manager just like on iOS.

I ran into this exact need, was about to create a PR but glad to find there's already one open!

Any ideas what else might be holding this up @tp ? Any pointers @kroikie ? Happy to help where I can

Btw, I've cloned this fork and rebased onto today's upstream/master and checked the diffs. Only conflicts to address are versioning-related in the CHANGELOG.md and pubspec.yaml's version number. I can PR to your fork if you'd like @tp.

Also, this fixes: #1036, #2835

Would this throw any error if Value is too long?

I tried using the custom event with string and it throws an error for lists too long.

Updated to the latest release version.

Now there is "only" an issue with iOS builds, but that also affects other PRs here and seems unrelated to my changes.

@collinjackson @kroikie Could you help our here moving this forward?

Closing this in favour of #4394 which is slightly further along in the review process and has tests. Thanks for sending this up though.