Flag option without a value does not get parsed

[rcjsuen]

let dockerfileAst = require("dockerfile-ast");
let dockerfile = dockerfileAst.DockerfileParser.parse(
    "HEALTHCHECK --meal=drink=water,food"
);
let flag = dockerfile.getInstructions()[0].getFlags()[0];
console.log(flag.getOptions().length);

1

The absence of an = sign is causing the second food option to not get parsed.