def mask_expand(invert: bool=True, use_cursor: bool=True, update_pivot:
    bool=True, smooth_iterations: int=2, mask_speed: int=5, use_normals:
    bool=True, keep_previous_mask: bool=False, edge_sensitivity: int=300):
    """Expands a mask from the initial active vertex under the cursor 

    :param invert: Invert, Invert the new mask 
    :type invert: bool
    :param use_cursor: Use Cursor, Expand the mask to the cursor position 
    :type use_cursor: bool
    :param update_pivot: Update Pivot Position, Set the pivot position to the mask border after creating the mask 
    :type update_pivot: bool
    :param smooth_iterations: Smooth iterations 
    :type smooth_iterations: int
    :param mask_speed: Mask speed 
    :type mask_speed: int
    :param use_normals: Use Normals, Generate the mask using the normals and curvature of the model 
    :type use_normals: bool
    :param keep_previous_mask: Keep Previous Mask, Generate the new mask on top of the current one 
    :type keep_previous_mask: bool
    :param edge_sensitivity: Edge Detection Sensitivity, Sensitivity for expanding the mask across sculpted sharp edges when using normals to generate the mask 
    :type edge_sensitivity: int
    """
    pass
