whole_func_string: function sign(message) {
          var baseString = OAuth.SignatureMethod.getBaseString(message);
          var signature = this.getSignature(baseString);
          OAuth.setParameter(message, "oauth_signature", signature);
          return signature; // just in case someone's interested
      }
func_code_string: function sign(message) {
          var baseString = OAuth.SignatureMethod.getBaseString(message);
          var signature = this.getSignature(baseString);
          OAuth.setParameter(message, "oauth_signature", signature);
          return signature; // just in case someone's interested
      }
func_documentation_string: Add a signature to the message.