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tooltips:
testdata/language-features/guard/guard03.lc 1:1-1:6  String
testdata/language-features/guard/guard03.lc 2:5-2:9  Bool
testdata/language-features/guard/guard03.lc 2:5-3:20  String
testdata/language-features/guard/guard03.lc 2:12-2:18  String
testdata/language-features/guard/guard03.lc 2:12-3:20  Bool->String
testdata/language-features/guard/guard03.lc 3:5-3:10  Bool
testdata/language-features/guard/guard03.lc 3:5-3:20  String
testdata/language-features/guard/guard03.lc 3:13-3:20  String