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/**
* Check if the given variable is a function
* @method
* @memberof Popper.Utils
* @argument {Any} functionToCheck - variable to check
* @returns {Boolean} answer to: is a function?
*/
export default function isFunction(functionToCheck) {
const getType = {};
return (
functionToCheck &&
getType.toString.call(functionToCheck) === '[object Function]'
);
}