KiokuDB::Reference - A symbolic reference to another KiokuDB::Entry.

    my $ref = KiokuDB::Reference->new(
        id => $some_id,
    );

This object serves as an internal marker to point to entries by UID.

The linker resolves these references by searching the live object set and loading entries from the backend as necessary.

id

The ID this entry refers to

is_weak

This reference is weak.