Function interp_grid_edit 

fn interp_grid_edit(
    args: &[RValue],
    named: &[(String, RValue)],
    context: &BuiltinContext<'_>,
) -> Result<RValue, RError>

Modify properties of a grob on the display list.

@param name character string naming the grob @param … named arguments to update on the grob @return NULL (invisibly)