[Home](./index.md) > [kibana-plugin-plugins-expressions-public](./kibana-plugin-plugins-expressions-public.md) > [ExpressionAstFunction](./kibana-plugin-plugins-expressions-public.expressionastfunction.md) ## ExpressionAstFunction type Signature: ```typescript export declare type ExpressionAstFunction = { type: 'function'; function: string; arguments: Record; debug?: ExpressionAstFunctionDebug; }; ```