SOURCE_FILE
  CONST
    CONST_KW "const"
    WHITESPACE " "
    UNDERSCORE "_"
    COLON ":"
    WHITESPACE " "
    PATH_TYPE
      PATH
        PATH_SEGMENT
          NAME_REF
            IDENT "u32"
    WHITESPACE " "
    EQ "="
    WHITESPACE " "
    LITERAL
      INT_NUMBER "0"
    SEMICOLON ";"
  WHITESPACE "\n"
