def set_row_min_height(self, y: int, min_height: int):
        """Sets a minimum height for blocks in the row with coordinate y."""
        if y < 0:
            raise IndexError('y < 0')
        self._min_heights[y] = min_height
Sets a minimum height for blocks in the row with coordinate y.
cirq-core/cirq/circuits/_block_diagram_drawer.py