/// This property accessor provides access to an object's properties by using the **[bracket notation][mdn]**.
///
/// In the object[property_name] syntax, the property_name is just a string or [Symbol][symbol]. So, it can be any string, including '1foo', '!bar!', or even ' ' (a space).
///
/// One can think of an object as an associative array (a.k.a. map, dictionary, hash, lookup table).
/// The keys in this array are the names of the object's properties.
///
/// It's typical when speaking of an object's properties to make a distinction between properties and methods. However,
/// the property/method distinction is little more than a convention. A method is simply a property that can be called (for example,
/// if it has a reference to a Function instance as its value).