COMPILATION_UNIT -> COMPILATION_UNIT [1:0]
|--PACKAGE_DEF -> package [1:0]
|   |--ANNOTATIONS -> ANNOTATIONS [1:39]
|   |--DOT -> . [1:39]
|   |   |--DOT -> . [1:28]
|   |   |   |--DOT -> . [1:22]
|   |   |   |   |--DOT -> . [1:11]
|   |   |   |   |   |--IDENT -> com [1:8]
|   |   |   |   |   `--IDENT -> puppycrawl [1:12]
|   |   |   |   `--IDENT -> tools [1:23]
|   |   |   `--IDENT -> checkstyle [1:29]
|   |   `--IDENT -> grammar [1:40]
|   `--SEMI -> ; [1:47]
`--ENUM_DEF -> ENUM_DEF [3:0]
    |--MODIFIERS -> MODIFIERS [3:0]
    |   `--LITERAL_PUBLIC -> public [3:0]
    |--ENUM -> enum [3:7]
    |--IDENT -> InputRegressionJavaEnum2 [3:12]
    `--OBJBLOCK -> OBJBLOCK [3:37]
        |--LCURLY -> { [3:37]
        `--RCURLY -> } [4:0]
