AI-generated Key Takeaways
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partial_failure_errorreports errors for operation failures in partial failure mode. - 
          
results[]contains all the outcomes from the mutate operation. 
Response message for experiment arm mutate.
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                   Errors that pertain to operation failures in the partial failure mode. Returned only when partial_failure = true and all errors occur inside the operations. If any errors occur outside the operations (for example, auth errors), we return an RPC level error.  | 
              
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                   All results for the mutate.  |