Is it possible to break long lines in a VS Code tasks.json?

Example
For the example I used __ as possible line break,

    {
        "label": "cmake",
        "type": "shell",
        "options": {
            "cwd": "${workspaceFolder}/build"
        },
        "command": "cmake "MinGW Makefiles"  ${workspaceFolder}; __
                    cmake --build ${command:cmake.buildDirectory} --config Debug __
                    --target all -j 30 --",
        }
    },