COMPILATION_UNIT -> COMPILATION_UNIT [1:0]
|--PACKAGE_DEF -> package [1:0]
|   |--ANNOTATIONS -> ANNOTATIONS [1:47]
|   |--DOT -> . [1:47]
|   |   |--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]
|   |   `--IDENT -> antlr4 [1:48]
|   `--SEMI -> ; [1:54]
|--IMPORT -> import [3:0]
|   |--DOT -> . [3:16]
|   |   |--DOT -> . [3:11]
|   |   |   |--IDENT -> java [3:7]
|   |   |   `--IDENT -> util [3:12]
|   |   `--IDENT -> Iterator [3:17]
|   `--SEMI -> ; [3:25]
|--IMPORT -> import [4:0]
|   |--DOT -> . [4:25]
|   |   |--DOT -> . [4:16]
|   |   |   |--DOT -> . [4:11]
|   |   |   |   |--IDENT -> java [4:7]
|   |   |   |   `--IDENT -> util [4:12]
|   |   |   `--IDENT -> function [4:17]
|   |   `--IDENT -> Function [4:26]
|   `--SEMI -> ; [4:34]
`--CLASS_DEF -> CLASS_DEF [6:0]
    |--MODIFIERS -> MODIFIERS [6:0]
    |   `--LITERAL_PUBLIC -> public [6:0]
    |--LITERAL_CLASS -> class [6:7]
    |--IDENT -> InputAntlr4AstRegressionTrickyYield [6:13]
    |--TYPE_PARAMETERS -> TYPE_PARAMETERS [6:48]
    |   |--GENERIC_START -> < [6:48]
    |   |--TYPE_PARAMETER -> TYPE_PARAMETER [6:49]
    |   |   `--IDENT -> T1 [6:49]
    |   `--GENERIC_END -> > [6:51]
    `--OBJBLOCK -> OBJBLOCK [6:53]
        |--LCURLY -> { [6:53]
        |--METHOD_DEF -> METHOD_DEF [7:4]
        |   |--MODIFIERS -> MODIFIERS [7:4]
        |   |   `--LITERAL_PUBLIC -> public [7:4]
        |   |--TYPE -> TYPE [7:11]
        |   |   |--IDENT -> Iterator [7:11]
        |   |   `--TYPE_ARGUMENTS -> TYPE_ARGUMENTS [7:19]
        |   |       |--GENERIC_START -> < [7:19]
        |   |       |--TYPE_ARGUMENT -> TYPE_ARGUMENT [7:20]
        |   |       |   `--IDENT -> T1 [7:20]
        |   |       `--GENERIC_END -> > [7:22]
        |   |--IDENT -> yield [7:24]
        |   |--LPAREN -> ( [7:29]
        |   |--PARAMETERS -> PARAMETERS [7:30]
        |   |--RPAREN -> ) [7:30]
        |   `--SLIST -> { [7:32]
        |       |--LITERAL_RETURN -> return [8:8]
        |       |   |--EXPR -> EXPR [8:20]
        |       |   |   `--METHOD_CALL -> ( [8:20]
        |       |   |       |--IDENT -> yield [8:15]
        |       |   |       |--ELIST -> ELIST [8:38]
        |       |   |       |   `--EXPR -> EXPR [8:38]
        |       |   |       |       `--METHOD_CALL -> ( [8:38]
        |       |   |       |           |--DOT -> . [8:29]
        |       |   |       |           |   |--IDENT -> Function [8:21]
        |       |   |       |           |   `--IDENT -> identity [8:30]
        |       |   |       |           |--ELIST -> ELIST [8:39]
        |       |   |       |           `--RPAREN -> ) [8:39]
        |       |   |       `--RPAREN -> ) [8:40]
        |       |   `--SEMI -> ; [8:41]
        |       `--RCURLY -> } [9:4]
        |--METHOD_DEF -> METHOD_DEF [11:4]
        |   |--MODIFIERS -> MODIFIERS [11:4]
        |   |   |--LITERAL_PRIVATE -> private [11:4]
        |   |   `--LITERAL_STATIC -> static [11:12]
        |   |--TYPE_PARAMETERS -> TYPE_PARAMETERS [11:19]
        |   |   |--GENERIC_START -> < [11:19]
        |   |   |--TYPE_PARAMETER -> TYPE_PARAMETER [11:20]
        |   |   |   `--IDENT -> T [11:20]
        |   |   |--COMMA -> , [11:21]
        |   |   |--TYPE_PARAMETER -> TYPE_PARAMETER [11:23]
        |   |   |   `--IDENT -> T1 [11:23]
        |   |   `--GENERIC_END -> > [11:25]
        |   |--TYPE -> TYPE [11:27]
        |   |   |--IDENT -> Iterator [11:27]
        |   |   `--TYPE_ARGUMENTS -> TYPE_ARGUMENTS [11:35]
        |   |       |--GENERIC_START -> < [11:35]
        |   |       |--TYPE_ARGUMENT -> TYPE_ARGUMENT [11:36]
        |   |       |   `--IDENT -> T1 [11:36]
        |   |       `--GENERIC_END -> > [11:38]
        |   |--IDENT -> yield [11:40]
        |   |--LPAREN -> ( [11:45]
        |   |--PARAMETERS -> PARAMETERS [11:46]
        |   |   `--PARAMETER_DEF -> PARAMETER_DEF [11:46]
        |   |       |--MODIFIERS -> MODIFIERS [11:46]
        |   |       |--TYPE -> TYPE [11:46]
        |   |       |   |--IDENT -> Function [11:46]
        |   |       |   `--TYPE_ARGUMENTS -> TYPE_ARGUMENTS [11:54]
        |   |       |       |--GENERIC_START -> < [11:54]
        |   |       |       |--TYPE_ARGUMENT -> TYPE_ARGUMENT [11:55]
        |   |       |       |   `--IDENT -> T [11:55]
        |   |       |       |--COMMA -> , [11:56]
        |   |       |       |--TYPE_ARGUMENT -> TYPE_ARGUMENT [11:57]
        |   |       |       |   `--IDENT -> T [11:57]
        |   |       |       `--GENERIC_END -> > [11:58]
        |   |       `--IDENT -> identity [11:60]
        |   |--RPAREN -> ) [11:68]
        |   `--SLIST -> { [11:70]
        |       |--LITERAL_RETURN -> return [12:8]
        |       |   |--EXPR -> EXPR [12:15]
        |       |   |   `--LITERAL_NULL -> null [12:15]
        |       |   `--SEMI -> ; [12:19]
        |       `--RCURLY -> } [13:4]
        `--RCURLY -> } [14:0]
