{
    "keys": [
        {
            "name": "fuel",
            "role": "input",
            "type": "fluid_stack"
        },
        {
            "name": "total_energy",
            "role": "other",
            "type": "int"
        },
        {
            "name": "burn_time",
            "role": "other",
            "type": "int"
        }
    ]
}