Function rpgffi::create_group_path

pub unsafe extern "C" fn create_group_path(
    root: *mut PlannerInfo, 
    rel: *mut RelOptInfo, 
    subpath: *mut Path, 
    target: *mut PathTarget, 
    groupClause: *mut List, 
    qual: *mut List, 
    numGroups: f64
) -> *mut GroupPath