# File lib/librarian/spec_change_set.rb, line 98
    def changed_dependency_names
      @changed_dependency_names ||= common_dependency_names.reject do |name|
        spec_dependency = spec_dependency_index[name]
        lock_dependency = lock_dependency_index[name]
        lock_manifest = lock_manifests_index[name]
        same = true
        same &&= spec_dependency.satisfied_by?(lock_manifest)
        same &&= spec_dependency.source == lock_dependency.source
        same
      end.to_set
    end