export function wrapHelper(helper, transformOptionsFn) {
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if (typeof helper !== 'function') {
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// This should not happen, but apparently it does in https://github.com/wycats/handlebars.js/issues/1639
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// We try to make the wrapper least-invasive by not wrapping it, if the helper is not a function.
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return helper;
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}
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let wrapper = function(/* dynamic arguments */) {
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const options = arguments[arguments.length - 1];
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arguments[arguments.length - 1] = transformOptionsFn(options);
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return helper.apply(this, arguments);
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};
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return wrapper;
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}
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