{
    "name": "inv",
    "synonyms": ["INV"],
    "result_type": "MixtureModel[a]",
    "call": "SModel.plus_inv[submodel,p_inv]",
    "args": [
        {
            "arg_name": "p_inv",
            "arg_type": "Double",
            "default_value": "~uniform[0,1]",
            "description": "The fraction of invariable sites."
        },
        {
            "arg_name": "submodel",
            "arg_type": "MixtureModel[a]"
        }
    ],
    "title": "Invariable sites model",
    "examples": ["hky85+inv",
		 "gtr+Rates.gamma+inv"],
    "extract": "all"
}
