kibana/docs/development/plugins/expressions/server/kibana-plugin-plugins-expressions-server.expressionastfunctionbuilder.addargument.md

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ExpressionAstFunctionBuilder.addArgument property

Adds an additional argument to the function. For multi-args, this should be called once for each new arg. Note that TS will not enforce whether multi-args are available, so only use this to update an existing arg if you are certain it is a multi-arg.

Signature:

addArgument: <A extends FunctionArgName<FnDef>>(name: A, value: FunctionArgs<FnDef>[A] | ExpressionAstExpressionBuilder) => this;