Centering model with CuraEngine when creating g-code? How can I center a model at the middle of the printing area of the printer when creating a g-code with CuraEngine. 

Are there any parameters I can add to ultimaker2.def.json to achieve this?
Thanks.
Found a solution.
This need to be applied under "settings"

"command_line_settings": {
    "label": "Command Line Settings",
    "description": "Settings which are only used if CuraEngine isn't called from the Cura frontend.",
    "type": "category",
    "enabled": true,
    "children": {
        "center_object": {
        "description": "Whether to center the object on the middle of the build platform (0,0), instead of using the coordinate system in which the object was saved.",
            "type": "bool",
            "label": "Center object",
            "default_value": true,
            "enabled": true
        }
    }
}