问vsCode扩展在ActivityBar上没有显示

EN

"contributes": {
        "configuration": {
            "type": "object",
            "title": "Example configuration",
            "properties": {
                "navCode.maxNumberOfProblems": {
                    "scope": "resource",
                    "type": "number",
                    "default": 100,
                    "description": "Controls the maximum number of problems produced by the server."
                },
                "navCode.trace.server": {
                    "scope": "window",
                    "type": "string",
                    "enum": [
                        "off",
                        "messages",
                        "verbose"
                    ],
                    "default": "off",
                    "description": "Traces the communication between VS Code and the language server."
                }
            }
        },
        "viewsContainers": {
            "activitybar": [
                {
                    "id": "package-explorer",
                    "title": "Package Explorer",
                    "icon": "media/my.svg"
                }
            ]
        },
        "views": {
            "package-explorer": [
                {
                    "id": "package-dependencies",
                    "name": "Dependencies"
                },
                {
                    "id": "package-outline",
                    "name": "Outline"
                }
            ]
        }
    },