code: def from_curvilinear(cls, x, y, z, formatter=numpy_formatter):
          
          return cls(x, y, z, formatter)
docs: Construct a contour generator from a curvilinear grid.
  
          Note
          ----
          This is an alias for the default constructor.
  
          Parameters
          ----------
          x : array_like
              x coordinates of each point in `z`.  Must be the same size as `z`.
          y : array_like
              y coordinates of each point in `z`.  Must be the same size as `z`.
          z : array_like
              The 2-dimensional curvilinear grid of data to compute
              contours for.  Masked arrays are supported.
          formatter : callable
              A conversion function to convert from the internal `Matplotlib`_
              contour format to an external format.  See :ref:`formatters` for
              more information.
  
          Returns
          -------
          : :class:`QuadContourGenerator`
              Initialized contour generator.