Press ⌃⇧␣ (macOS), Ctrl+Shift+Space (Windows/Linux) to invoke smart completion. If the type can be determined then the list of suggestions will be filtered to the correct type.
Here are some places you can use it:
- In the right part of assignment statements
- In variable initializers
- In return statements
- In the list of arguments of a method call
- After the new keyword in an object declaration
- In chained expressions