How to use the regionmask.core.regions.Regions_cls function in regionmask

name[18] = "South Asia"
name[19] = "Central Asia"
name[20] = "Tibet"
name[21] = "North Asia"

# =============================================================================


from ..core.regions import Regions_cls

numbers = range(1, 22)

source = ('Giorgi and Franciso, 2000 '
	      '(http://onlinelibrary.wiley.com/doi/10.1029/1999GL011016)')

giorgi = Regions_cls('Giorgi', numbers, name, abbrevs, outline, 
	                 source=source)

numbers = [1, 2]
            names = {1:'Unit Square1', 2: 'Unit Square2'}
            abbrevs = {1:'uSq1', 2:'uSq2'}
            poly = {1: Polygon(outl1), 2: Polygon(outl2)}

            r = Regions_cls(name, numbers, names, abbrevs, poly)
        """

        msg = (
            "Using 'Regions_cls' is deprecated, please use 'Regions' instead."
            " Please note that the call signature is different."
        )
        warnings.warn(msg, FutureWarning, stacklevel=3)

        super(Regions_cls, self).__init__(
            outlines=outlines,
            numbers=numbers,
            names=names,
            abbrevs=abbrevs,
            name=name,
            source=source,
        )

        if centroids is not None:
            msg = (
                "Specifying 'centroids' is deprecated and the keyword will be "
                "removed in the next version."
            )
            warnings.warn(msg, FutureWarning, stacklevel=3)

            numbers = self.numbers

22 : 'E. Asia',
23 : 'S. Asia',
24 : 'S.E. Asia',
25 : 'N. Australia',
26 : 'S. Australia/New Zealand'}

# =============================================================================

from ..core.regions import Regions_cls

numbers = range(1, 27)
source = ('Seneviratne et al., 2012 '
	      '(https://www.ipcc.ch/pdf/special-reports/srex/'
	      'SREX-Ch3-Supplement_FINAL.pdf)')

srex = Regions_cls('SREX', numbers, name, short_name, outline,
	               source=source)