contextValue 
  Context value of the comment. This can be used to contribute comment specific actions. For example, a comment is given a context value as editable. When contributing actions to comments/comment/title using menus extension point, you can specify context value for key comment in when expression like comment == editable.
    "contributes": {
    	"menus": {
    		"comments/comment/title": [
    			{
    				"command": "extension.deleteComment",
    				"when": "comment == editable"
    			}
    		]
    	}
    }Content copied to clipboard
This will show action extension.deleteComment only for comments with contextValue is editable.