See the documentaton for "reek_of". Notable differences to reek_of: 1.) "reek_of" doesn't mind if there are other smells of a different type. "reek_only_of" will fail in that case. 2.) "reek_only_of" doesn't support the additional smell_details hash. @param smell_type [Symbol, String] The "smell type" to check for. @public @quality :reek:UtilityFunction