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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def create(cls, infile, config=None, params=None, mask=None):
 """Create a new instance of GTAnalysis from an analysis output file generated with `~fermipy.GTAnalysis.write_roi`. By default the new instance will inherit the configuration of the saved analysis instance. The configuration may be overriden by passing a configuration file path with the ``config`` argument. Parameters infile : str Path to the ROI results file. config : str Path to a configuration file. This will override the configuration in the ROI results file. params : str Path to a yaml file with updated parameter values mask : str Path to a fits file with an updated mask """


        infile = os.path.abspath(infile)
        roi_file, roi_data = utils.load_data(infile)

        if config is None:
            config = roi_data['config']
            validate = False
        else:
            validate = True

        gta = cls(config, validate=validate)
        gta.setup(init_sources=False)
        gta.load_roi(infile, params=params, mask=mask)
        return gta