java.FILE
  IMPORT_LIST
    <empty list>
  CLASS
    MODIFIER_LIST
      <empty list>
    CLASS_KEYWORD
    WHITE_SPACE
    IDENTIFIER
    TYPE_PARAMETER_LIST
      <empty list>
    EXTENDS_LIST
      <empty list>
    IMPLEMENTS_LIST
      <empty list>
    WHITE_SPACE
    LBRACE
    WHITE_SPACE
    METHOD
      MODIFIER_LIST
        PUBLIC_KEYWORD
      TYPE_PARAMETER_LIST
        <empty list>
      WHITE_SPACE
      TYPE
        JAVA_CODE_REFERENCE
          IDENTIFIER
          REFERENCE_PARAMETER_LIST
            <empty list>
      WHITE_SPACE
      IDENTIFIER
      PARAMETER_LIST
        LPARENTH
        PARAMETER
          MODIFIER_LIST
            <empty list>
          TYPE
            INT_KEYWORD
          WHITE_SPACE
          IDENTIFIER
        RPARENTH
      THROWS_LIST
        <empty list>
      WHITE_SPACE
      ERROR_ELEMENT
        IDENTIFIER
      WHITE_SPACE
      CODE_BLOCK
        LBRACE
        WHITE_SPACE
        RETURN_STATEMENT
          RETURN_KEYWORD
          WHITE_SPACE
          LITERAL_EXPRESSION
            NULL_KEYWORD
          SEMICOLON
        WHITE_SPACE
        RBRACE
    WHITE_SPACE
    RBRACE