SolvingMode

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Defines how the solver processes the request, dictating whether it solves the model, validates it, or detects infeasible shipments.
Offers three modes: DEFAULT_SOLVE for solving, VALIDATE_ONLY for validation, and DETECT_SOME_INFEASIBLE_SHIPMENTS for identifying problematic shipments.
In all modes except VALIDATE_ONLY , invalid requests will return an INVALID_REQUEST error, with potential for controlling the number of error messages.
The DETECT_SOME_INFEASIBLE_SHIPMENTS mode focuses on pre-processing infeasibility detection without fully solving the problem.

Defines how the solver should handle the request. In all modes but VALIDATE_ONLY , if the request is invalid, you will receive an INVALID_REQUEST error. See maxValidationErrors to cap the number of errors returned.

Enums
`DEFAULT_SOLVE`	Solve the model. Warnings may be issued in [OptimizeToursResponse.validation_errors][google.cloud.optimization.v1.OptimizeToursResponse.validation_errors].
`VALIDATE_ONLY`	Only validates the model without solving it: populates as many `OptimizeToursResponse.validation_errors` as possible.
`DETECT_SOME_INFEASIBLE_SHIPMENTS`	Only populates `OptimizeToursResponse.validation_errors` or `OptimizeToursResponse.skipped_shipments` , and doesn't actually solve the rest of the request ( `status` and `routes` are unset in the response). If infeasibilities in `injectedSolutionConstraint` routes are detected they are populated in the `OptimizeToursResponse.validation_errors` field and `OptimizeToursResponse.skipped_shipments` is left empty. IMPORTANT : not all infeasible shipments are returned here, but only the ones that are detected as infeasible during preprocessing.
`TRANSFORM_AND_RETURN_REQUEST`	This mode only works if `ShipmentModel.objectives` is not empty. The request is not solved. It is only validated and filled with costs corresponding to the given objectives. Also see the documentation of `ShipmentModel.objectives` . The resulting request is returned as `OptimizeToursResponse.processed_request` . Experimental: See https://developers.google.com/maps/tt/route-optimization/experimental/objectives/make-request for more details.

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SolvingMode