How to refresh Line markers for currently opened file?

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Permanently deleted user
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LineMarkerProvider#collectSlowLineMarkers() is only called when a new file is opened. But I'd like to show these line markers on demand (when the user presses something). This will work for newly opened files but not for those files which are already open(LineMarkerProvider#collectSlowLineMarkers() is not called again for the same file).

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Jakub Chrzanowski
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Try with:

 DaemonCodeAnalyzer.getInstance(project).restart(psiFile)
 
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Thanks. This works.

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Diego Marcher
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Where should I invoke this method? I want the line markers to be refreshed every time the file changes.

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