function fullMethodName(arrayMethodName) {
	if (["from", "of", "isArray"].includes(arrayMethodName)) {
		return "Array.".concat(arrayMethodName);
	}
	return "Array.prototype.".concat(arrayMethodName);
}
Returns a human-legible description of an array method
@param {string} arrayMethodName A method name to fully qualify
@returns {string} the method name prefixed with `Array.` if it is a class method,
     or else `Array.prototype.` if it is an instance method.