PPI::Document
  PPI::Statement
    PPI::Structure::List  	( ... )
      PPI::Statement
        PPI::Structure::Constructor  	[ ... ]
        PPI::Token::Operator  	','
        PPI::Structure::Constructor  	[ ... ]
    PPI::Token::Structure  	';'
  PPI::Statement
    PPI::Structure::List  	( ... )
      PPI::Statement
        PPI::Structure::Constructor  	{ ... }
        PPI::Token::Operator  	','
        PPI::Structure::Constructor  	{ ... }
    PPI::Token::Structure  	';'