COMPILATION_UNIT -> COMPILATION_UNIT [1:1]
|--PACKAGE_DEF -> package [1:1]
|   |--ANNOTATIONS -> ANNOTATIONS [1:40]
|   |--DOT -> . [1:40]
|   |   |--DOT -> . [1:29]
|   |   |   |--DOT -> . [1:23]
|   |   |   |   |--DOT -> . [1:12]
|   |   |   |   |   |--IDENT -> com [1:9]
|   |   |   |   |   `--IDENT -> puppycrawl [1:13]
|   |   |   |   `--IDENT -> tools [1:24]
|   |   |   `--IDENT -> checkstyle [1:30]
|   |   `--IDENT -> grammar [1:41]
|   `--SEMI -> ; [1:48]
`--ENUM_DEF -> ENUM_DEF [3:1]
    |--MODIFIERS -> MODIFIERS [3:1]
    |   `--LITERAL_PUBLIC -> public [3:1]
    |--ENUM -> enum [3:8]
    |--IDENT -> InputRegressionJavaEnum2 [3:13]
    `--OBJBLOCK -> OBJBLOCK [3:38]
        |--LCURLY -> { [3:38]
        `--RCURLY -> } [4:1]
