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1.                 From The Free On-line Dictionary of Computing (19 January 2023):
                   
   
   
                   
                     
   wrapper
      <programming> Code which is combined with another piece of
      code to determine how that code is executed.  The wrapper
      acts as an interface between its caller and the wrapped code.
      This may be done for compatibility, e.g. if the wrapped code
      is in a different programming language or uses different
      calling conventions, or for security, e.g. to prevent the
      calling program from executing certain functions.  The
      implication is that the wrapped code can only be accessed via
      the wrapper.
      (1998-12-15)