Subsequences are defined as: "a subsequence of a given sequence is a sequence that can be derived from the given sequence by deleting some or no elements without changing the order of the remaining elements."
See: https://en.wikipedia.org/wiki/Subsequence
This new matcher checks if a container contains elements that match a given sequence of matchers in the specified order, but not necessarily contiguously.
The implementation is very similar to other matchers like ElementsAre or Contains.
PiperOrigin-RevId: 918323422
Change-Id: I56d7ebbe6f81038c93546ef7585db59eea5dbd57
Abseil Team
add971c7cb