Tuple types represent a fixed length list, where the elements can have different types.| flow.org
Objects can be used in many different ways in JavaScript.| flow.org
mixed is the supertype of all types. All values are mixed.| flow.org
It's safe to use an object with "extra" properties in a position that is| flow.org
Refinements allow us to narrow the type of a value based on conditional tests.| flow.org