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# Function default_variable_patterns

> Return the default regex patterns used for variable extraction.

Generated from `cargo doc --no-deps -p nemo-relay -p nemo-relay-adaptive -p nemo-relay-ffi`.

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Return the default regex patterns used for variable extraction.

## Returns

A vector of built-in [`VariablePattern`](/reference/api/rust-library-reference/nemo-relay-adaptive/acg/variable_extractor/struct-variablepattern) values covering common timestamps and request identifiers.