free package:streamly-core
Makes an immutable array using the underlying memory of the mutable
array.
Please make sure that there are no other references to the mutable
array lying around, so that it is never used after freezing it using
unsafeFreeze. If the underlying array is mutated, the immutable
promise is lost.
Pre-release
The remaining capacity in the array for appending more elements
without reallocation.
Pre-release