luhn-generator/update/node_modules/rxjs/_esm2015/internal/util/isPromise.js

A generator of numbers that passes the validation of Luhn algorithm or Luhn formula, also known as the 'modulus 10' or 'mod 10' algorithm

export function isPromise(value) {
    return !!value && typeof value.subscribe !== 'function' && typeof value.then === 'function';
}
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