[To do: text description of syntax]
Table 4.1. Function Modifiers
| abstract | An instance function declaration without a body. The defining class must also be abstract. A concrete (non-abstract) class will need to override the function to provide a definition. |
| bound | A bound function allows a bound context to extend into a function call. |
| override | An instance function can override the definition in its superclass if the override modifier is used. |
| package | The function can only be called from the package where it is defined. See Access Modifiers. |
| protected | The function can only be called from the package where it is defined and from subclasses of the class where it is defined. See Access Modifiers. |
| public | The function can be called from anywhere. See Access Modifiers. |