<<NULL>>
[
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    key.column: 10,
    key.filepath: parse_error.swift,
    key.severity: source.diagnostic.severity.error,
    key.description: "expected '(' in argument list of function declaration",
    key.diagnostic_stage: source.diagnostic.stage.swift.parse,
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      {
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        key.length: 0,
        key.sourcetext: "()"
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  {
    key.line: 5,
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    key.severity: source.diagnostic.severity.error,
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    key.diagnostic_stage: source.diagnostic.stage.swift.sema,
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[
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    key.filepath: parse_error.swift,
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  {
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