code: function(sName, sXHRMethod) {
  			var bRemove = delete mRegistry[sXHRMethod][sName];
  			Log.debug("Unregister '" + sName + "' for XHR function '" + sXHRMethod + (bRemove ? "'" : "' failed"), XHRINTERCEPTOR);
  			return bRemove;
  		}
docs: Unregister a registered function.
  
  @param {string} sName Name under which the function is registered
  @param {string} sXHRMethod Name of the actual XHR method
  @return {boolean} True if unregister was successful
  @public