Function parseParameter

docs/app/js/sanddance-app.js:146483–146490

* Parse a single parameter.

(spec, ctx, params)

/**
 * Parse a single parameter.
 */ function parseParameter(spec, ctx, params) {
    if (!spec || !(0, _vegaUtil.isObject)(spec)) return spec;
    for(let i = 0, n = PARSERS.length, p; i < n; ++i){
        p = PARSERS[i];
        if ((0, _vegaUtil.hasOwnProperty)(spec, p.key)) return p.parse(spec, ctx, params);
    }
    return spec;
}
/** Reference parsers. */ var PARSERS = [
    {
        key: "$ref",