Function postgis_diesel::operators::contained_by

pub fn contained_by<T, U>(left: T, right: U) -> BBContainedBy<T, U::Expression>where
    T: Expression,
    <T as Expression>::SqlType: SqlType,
    U: AsExpression<T::SqlType>,

The @ operator returns TRUE if the bounding box of geometry A is completely contained by the bounding box of geometry B.