Remove default implementation of extend_from_iter
from RelationshipSourceCollection
#20255
+32
−7
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Objective
extend_from_iter
from the RelationshipSourceCollection trait to standardize collection types providing their own implementation.extend_from_iter
impl from RelationshipSourceCollection trait #20253Solution
extend_from_iter
extend_from_iter
implementation for BTreeSet that uses its native .extend() method