Define your custom function.
Tip: Ctrl+Space will bring
up a list of the available functions. (For some locales, you need to use a
different shortcut to allow Content Assist to display the available functions,
such as Alt+/. Check your Eclipse preferences to verify or set the Content
Assist shortcut.) If you've started typing, Content Assist will bring up a list
of keywords that are possible matches for what you've already typed.