Function diesel_ltree::index

pub fn index<a, b, offset>(
    a: a, 
    b: b, 
    offset: offset
) -> index<<a as AsExpression<Ltree>>::Expression, <b as AsExpression<Ltree>>::Expression, <offset as AsExpression<Int4>>::Expression> where
    a: AsExpression<Ltree>,
    b: AsExpression<Ltree>,
    offset: AsExpression<Int4>,