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is_array_backed

container.abstract_array.is_array_backed

 => 
bool
[Redefinition of  Sequence.is_array_backed]
[Contains abstract features]
is this Sequence known to be array backed? If so, this means that operations
like index[] are fast.
0.094dev (2025-06-18 15:08:51 GIT hash 89cffc23ae669b0898a5564fefbf793fcb8e5ca7 built by fridi@fzen)