how to display the function name only (without the qualifier class name) in the outline tab in vscode using vscode-cpptool-0.26.3-insider

After updating the vscode-cpptool from version 0.23.1 to 0.26.3-insider, the outline tab in the vscode started displaying the functions names including the class name, for example: MyClassName::MyFunctionNmae(). Because some class names are so long I prefer to display only the function name without the class name. I need help to do this as searching in the web didn't help.

Thanks in advance for any help.