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//opt/alt/ruby18/share/ri/1.8/system/Set/add%3f-i.yaml
--- !ruby/object:RI::MethodDescription aliases: [] block_params: comment: - !ruby/struct:SM::Flow::P body: Adds the given object to the set and returns self. If the object is already in the set, returns nil. full_name: Set#add? is_singleton: false name: add? params: (o) visibility: public
