java.FILE
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    IMPORT_STATEMENT
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      WHITE_SPACE
      JAVA_CODE_REFERENCE
        JAVA_CODE_REFERENCE
          IDENTIFIER
          REFERENCE_PARAMETER_LIST
            <empty list>
        DOT
        IDENTIFIER
        REFERENCE_PARAMETER_LIST
          <empty list>
      SEMICOLON
  WHITE_SPACE
  IMPLICIT_CLASS
    METHOD
      MODIFIER_LIST
        PUBLIC_KEYWORD
      TYPE_PARAMETER_LIST
        <empty list>
      WHITE_SPACE
      IDENTIFIER
      THROWS_LIST
        <empty list>
      CODE_BLOCK
        LBRACE
        WHITE_SPACE
        RBRACE