@gerhobbelt/mathjax-third-party-extensions/legacy/siunitx/node_modules/rxjs/_esm2015/internal/util/isObservable.js

A list of MathJax extensions provided by third-party contributors

import { Observable } from '../Observable';
export function isObservable(obj) {
    return !!obj && (obj instanceof Observable || (typeof obj.lift === 'function' && typeof obj.subscribe === 'function'));
}
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