java.FILE
  IMPORT_LIST
    <empty list>
  CLASS
    MODIFIER_LIST
      <empty list>
    CLASS_KEYWORD
    WHITE_SPACE
    IDENTIFIER
    TYPE_PARAMETER_LIST
      LT
      TYPE_PARAMETER
        IDENTIFIER
        WHITE_SPACE
        EXTENDS_BOUND_LIST
          EXTENDS_KEYWORD
          WHITE_SPACE
          JAVA_CODE_REFERENCE
            IDENTIFIER
            REFERENCE_PARAMETER_LIST
              LT
              TYPE
                JAVA_CODE_REFERENCE
                  IDENTIFIER
                  REFERENCE_PARAMETER_LIST
                    <empty list>
              GT
      GT
    WHITE_SPACE
    EXTENDS_LIST
      EXTENDS_KEYWORD
      WHITE_SPACE
      JAVA_CODE_REFERENCE
        IDENTIFIER
        REFERENCE_PARAMETER_LIST
          LT
          TYPE
            JAVA_CODE_REFERENCE
              IDENTIFIER
              REFERENCE_PARAMETER_LIST
                LT
                TYPE
                  JAVA_CODE_REFERENCE
                    IDENTIFIER
                    REFERENCE_PARAMETER_LIST
                      <empty list>
                GT
          GT
    IMPLEMENTS_LIST
      <empty list>
    WHITE_SPACE
    LBRACE
    WHITE_SPACE
    METHOD
      MODIFIER_LIST
        <empty list>
      TYPE_PARAMETER_LIST
        <empty list>
      TYPE
        INT_KEYWORD
      WHITE_SPACE
      IDENTIFIER
      PARAMETER_LIST
        LPARENTH
        PARAMETER
          MODIFIER_LIST
            <empty list>
          TYPE
            JAVA_CODE_REFERENCE
              IDENTIFIER
              REFERENCE_PARAMETER_LIST
                <empty list>
          WHITE_SPACE
          IDENTIFIER
        RPARENTH
      THROWS_LIST
        <empty list>
      WHITE_SPACE
      CODE_BLOCK
        LBRACE
        WHITE_SPACE
        RETURN_STATEMENT
          RETURN_KEYWORD
          WHITE_SPACE
          BINARY_EXPRESSION
            METHOD_CALL_EXPRESSION
              REFERENCE_EXPRESSION
                REFERENCE_EXPRESSION
                  REFERENCE_PARAMETER_LIST
                    <empty list>
                  IDENTIFIER
                DOT
                REFERENCE_PARAMETER_LIST
                  <empty list>
                IDENTIFIER
              EXPRESSION_LIST
                LPARENTH
                RPARENTH
            WHITE_SPACE
            GTGT
            WHITE_SPACE
            LITERAL_EXPRESSION
              INTEGER_LITERAL
          SEMICOLON
        WHITE_SPACE
        RBRACE
    WHITE_SPACE
    RBRACE