code: function(method, properties) {
              if (this.methods[method]) throw "Method already define for this backend: "+method;
  
              properties.id = method;
              properties.regexp = this.routeToRegExp(method);
              this.methods[method] = properties;
  
              return this;
          }
docs: Add a backend method
  
  @method addMethod
  @param {string} method name for this method
  @param {object} informations about this method