code: def check_instance(
      mzn, *dzn_files, data=None, include=None, stdlib_dir=None, globals_dir=None,
      allow_multiple_assignments=False
  ):
      
  
      args = ['--instance-check-only']
      args += _flattening_args(
          mzn, *dzn_files, data=data, include=include, stdlib_dir=stdlib_dir,
          globals_dir=globals_dir,
          allow_multiple_assignments=allow_multiple_assignments
      )
  
      input = mzn if args[-1] == '-' else None
      proc = _run_minizinc_proc(*args, input=input)
  
      if proc.stderr_data:
          raise MiniZincError(
              mzn if input is None else '\n' + mzn + '\n', args, proc.stderr_data
          )
docs: Perform instance checking on a model + data.
  
      This function calls the command ``minizinc --instance-check-only`` to check
      for consistency of the given model + data.
  
      Parameters
      ----------
      mzn : str
          The minizinc model. This can be either the path to the ``.mzn`` file or
          the content of the model itself.
      *dzn_files
          A list of paths to dzn files to attach to the minizinc execution,
          provided as positional arguments; by default no data file is attached.
      data : dict
          Additional data as a list of strings containing dzn variables
          assignments.
      include : str or list
          One or more additional paths to search for included ``.mzn`` files.
      stdlib_dir : str
          The path to the MiniZinc standard library. Provide it only if it is
          different from the default one.
      globals_dir : str
          The path to the MiniZinc globals directory. Provide it only if it is
          different from the default one.
      allow_multiple_assignments : bool
          Whether to allow multiple assignments of variables. Sometimes is
          convenient to simply let the data file override the value already
          assigned in the minizinc file. Default is ``False``.
  
      Raises
      ------
          ``MiniZincError`` if instance checking fails.