kibana/docs/development/plugins/expressions/public/kibana-plugin-plugins-expressions-public.expressionastexpressionbuilder.findfunction.md

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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.

Signature:

findFunction: <FnDef extends AnyExpressionFunctionDefinition = AnyExpressionFunctionDefinition>(fnName: InferFunctionDefinition<FnDef>['name']) => Array<ExpressionAstFunctionBuilder<FnDef>> | [];