lml-main/packages/cosmo-ui-build/node_modules/mathjs/lib/utils/bignumber/isBigNumber.js

This is now a mono repository published into many standalone packages.

/**
 * Test whether a value is a BigNumber
 * @param {*} x
 * @return {boolean}
 */
module.exports = function isBigNumber(x) {
  return x && x.constructor.prototype.isBigNumber || false
}