Fix rawtypes warning
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@ -466,7 +466,7 @@ public class Antlr4Mojo
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throws TokenStreamException, RecognitionException, IOException, InclusionScanException {
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// Which files under the source set should we be looking for as grammar files
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//
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SourceMapping mapping = new SuffixMapping("g4", Collections.EMPTY_SET);
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SourceMapping mapping = new SuffixMapping("g4", Collections.<String>emptySet());
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// What are the sets of includes (defaulted or otherwise).
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//
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