--- !ruby/object:RI::MethodDescription aliases: - !ruby/object:RI::AliasName name: "<<" block_params: comment: - !ruby/struct:SM::Flow::P body: Adds the given object to the set and returns self. Use <tt>merge</tt> to add several elements at once. full_name: Set#add is_singleton: false name: add params: (o) visibility: public