Checks if value is an object.
Arrays are also considered objects.
The type guard here says o is any.
TODO: When TS 4.9.x is released, change this to o is object.
At that point 'x' in o checks become type guards that
can assert the property's existence.
Checks if value is an object. Arrays are also considered objects. The type guard here says
o is any. TODO: When TS 4.9.x is released, change this too is object. At that point'x' in ochecks become type guards that can assert the property's existence.