interface Animal {
    speciesName: string
    legCount: number,
}

function serializeBasicAnimalData(a: Animal) {
    // something
}

serializeBasicAnimalData({
    legCount: 65,
    speciesName: "weird 65-legged animal",
    specialPowers: "Devours plastic"
})

var weirdAnimal = {
    legCount: 65,
    speciesName: "weird 65-legged animal",
    specialPowers: "Devours plastic"
};
serializeBasicAnimalData(weirdAnimal);