TypeScript - re-use an interface's property using object access notation

Re-use an interface's property by extracting it using normal object access notation

This keeps the type in line/sync with the interface, eg if the interface property changes then the type will be updated automatically

interface MyInterface {
    someComplicatedProperty: string | number | object ... 

type complicatedType = MyInterface['someComplicatedProperty']

// now complicatedType is equal to string | number | object ...
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