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as_array_backed

Sequence.as_array_backed

create an array backed version of this sequence in case this is not array
backed. This will ensure that operations like index[] or drop perform
in constant time.

returns Sequence.this if is_array_backed.
Postcondition
post
  debug: result.is_array_backed
0.097dev (GIT hash 7935358ec8b7743224ffa00b87fbe7bbf70dc69e)
last changed: 2026-06-12