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## Expected Behavior
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    compiling from source placeholder: validations: required: false

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    url: https://github.com/fastapi/fastapi/discussions/categories/questions
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## Current Behavior
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    GWT happens to use the prod .gwt.xml, so it looks for no supersource for
    tests, either. This causes it to fail to find AtomicLongMapTest.

    Our workaround is to tell GWT that util.concurrent and all other packages
    have prod supersource, even if they have none. GWT is happy to ignore us
    when we specify a nonexistent path.