## Property A `Property` represents custom property behavior that can be defined on many objects if you so desire. These are most useful when defining the properties of a new `Type`. ```CoffeeScript MyType = Type instance: ``` There are a plethora of use cases for the `Property` type. Be sure to read all of the examples to see what's possible. --- ### Glossary      [Options]()      [Properties]()      [Examples]() --- ### Options If you decide to pass an options object when constructing a `Property`, these are the recognized options: - #### value Type: `Any` Required: **No** Default: `undefined` The initial value of this property. - #### type Type: `Type.Kind` or `ArrayOf(Type.Kind)` Required: **No** Default: `Any` If this property is ever set to an invalid type, a `TypeError` will be thrown. - #### lazy Type: `Function.Kind` Required: **No** Default: `undefined` This function is called the first time this property is accessed via the getter. - #### get(currentValue) Type: `Boolean` Required: **No** Default: `false` - #### set(newValue, oldValue) Type: `Boolean` Required: **No** Default: `false` - #### willSet(newValue, currentValue) Type: `Boolean` Required: **No** Default: `false` - #### didSet(oldValue, currentValue) Type: `Boolean` Required: **No** Default: `false` - #### enumerable Type: `Boolean` Required: **No** Default: `false` - #### writable Type: `Boolean` Required: **No** Default: `false` - #### configurable Type: `Boolean` Required: **No** Default: `false` --- ### Properties The options object you pass when creating a `Property` is turned into the created `Property`; thus, all keys defined on the options object will be accessible on the returned `Property` instance. These properties are available on all `Property` instances: - #### define(object, key) Defines this `Property` using the passed `key` with the passed `object`. --- ### Examples ####