fn input_preference(&self) -> (OwnershipPreference, OwnershipPreference) {
        (
            OwnershipPreference::INDIFFERENT,
            OwnershipPreference::INDIFFERENT,
        )
    }
/// Ownership preference on the operator's input streams
/// (see [`OwnershipPreference`]).
Ownership preference on the operator's input streams
.
Ownership preference on the operator ' s input streams .
fn input_preference(&self) -> (OwnershipPreference, OwnershipPreference) {
        (
            OwnershipPreference::INDIFFERENT,
            OwnershipPreference::INDIFFERENT,
        )
    }
fn input_preference ( & self ) -> ( OwnershipPreference , OwnershipPreference ) { ( OwnershipPreference :: INDIFFERENT , OwnershipPreference :: INDIFFERENT , ) }
Ownership preference on the operator's input streams
(see [`OwnershipPreference`]).
Ownership preference on the operator ' s input streams ( see [ ` OwnershipPreference ` ] ) .
&self