kibana/docs/development/plugins/expressions/public/kibana-plugin-plugins-expressions-public.expressionastexpressionbuilder.findfunction.md
2020-09-30 09:10:28 +02:00

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[Home](./index.md) &gt; [kibana-plugin-plugins-expressions-public](./kibana-plugin-plugins-expressions-public.md) &gt; [ExpressionAstExpressionBuilder](./kibana-plugin-plugins-expressions-public.expressionastexpressionbuilder.md) &gt; [findFunction](./kibana-plugin-plugins-expressions-public.expressionastexpressionbuilder.findfunction.md)
## ExpressionAstExpressionBuilder.findFunction property
Recursively searches expression for all ocurrences of the function, including in subexpressions.
Useful when performing migrations on a specific function, as you can iterate over the array of references and update all functions at once.
<b>Signature:</b>
```typescript
findFunction: <FnDef extends AnyExpressionFunctionDefinition = AnyExpressionFunctionDefinition>(fnName: InferFunctionDefinition<FnDef>['name']) => Array<ExpressionAstFunctionBuilder<FnDef>> | [];
```