Gutter Icon

I am trying to show a gutter icon for a function in a custom language plugin using an annotation. The problem is that if one of the child nodes has an error then the gutter icon is not shown. Is there a solution to this?

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Create your annotation for a leaf element, token (like name identifier).
Then there won't be any problematic children.

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Debugging the annotate method, the node containing the children with errors is never passed as a parameter. Fixing the errors resolves this.

I am using TextRange on subset of an identifier, is that the same as applying annotations to a leaf node?

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You just analyze the leaf element instead of its parent in your
annotate() method and give the respective text range. BTW a more
user-friendly way of providing gutter icons is to implement
LineMarkerProvider extension.

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The LineMarkerProvider sounds like a good solution. Are there any examples where this is used? There is not a lot documentation in the OpenAPI.

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There are LineMarkerProvider's in JavaScript, Python, Ruby, Spring
open-source plugins.

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Thank you. I found an example in the Javascript plugin.

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