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kibana/docs/development/plugins/expressions/server/kibana-plugin-plugins-expressions-server.execution.start.md
Michael Dokolin 49a18483d3
Refactor execution service to use observables underneath (#96065) 
* Refactor execution service to use observables underneath
* Fix canvas plugin to initialize workspace after assets
* Update expression functions implementations to resolve observables instead of promises
2021-04-22 20:36:25 +02:00

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Home > kibana-plugin-plugins-expressions-server > Execution > start

Execution.start() method

Call this method to start execution.

N.B. input is initialized to null rather than undefined for legacy reasons, because in legacy interpreter it was set to null by default.

Signature:

start(input?: Input): Observable<Output | ExpressionValueError>;

Parameters

Parameter Type Description
input Input

Returns:

Observable<Output | ExpressionValueError>