def forward(self, dim_positions: dict[str, Any]) -> dict[Hashable, Any]:
        """Perform grid -> world coordinate transformation.

        Parameters
        ----------
        dim_positions : dict
            Grid location(s) along each dimension (axis).

        Returns
        -------
        coord_labels : dict
            World coordinate labels.

        """
        # TODO: cache the results in order to avoid re-computing
        # all labels when accessing the values of each coordinate one at a time
        raise NotImplementedError
Perform grid -> world coordinate transformation.

        Parameters
        ----------
        dim_positions : dict
            Grid location(s) along each dimension (axis).

        Returns
        -------
        coord_labels : dict
            World coordinate labels.

        
xarray/core/coordinate_transform.py