* Mimics the `find` method of Array * @method * @memberof Popper.Utils * @argument {Array} arr * @argument prop * @argument value * @returns ind

* Returns the offset parent of the given element * @method * @memberof Popper.Utils * @argument {Element} element * @returns {Element} offset pare

* Get the opposite placement of the given one * @method * @memberof Popper.Utils * @argument {String} placement * @returns {String} flipped placem

* Returns the scrolling parent of the given element * @method * @memberof Popper.Utils * @argument {Element} element * @returns {Element} scroll p

* Use function string name to check built-in types, * because a simple equality check will fail when running * across different vms / iframes.

* Check if two values are loosely equal - that is, * if they are plain objects, do they have the same shape?

* Merge two option objects into a new one. * Core utility used in both instantiation and inheritance.

* Ensure a function is called only once.

* Convert a input value to a number for persistence. * If the conversion fails, return original string.

* Recursively traverse an object to evoke all converted * getters, so that every nested property inside the object * is collected as a "deep" depend

* Define a property.

* Computed the boundaries limits and return them * @method * @memberof Popper.Utils * @param {HTMLElement} popper * @param {HTMLElement} reference

* Get bounding client rect of given element * @method * @memberof Popper.Utils * @param {HTMLElement} element * @return {Object} client rect

* Returns the parentNode or the host of the element * @method * @memberof Popper.Utils * @argument {Element} element * @returns {Element} parent

* Tells if a given input is a number * @method * @memberof Popper.Utils * @param {*} input to check * @return {Boolean}