[Home](./index.md) > [kibana-plugin-plugins-expressions-server](./kibana-plugin-plugins-expressions-server.md) > [ExpressionFunction](./kibana-plugin-plugins-expressions-server.expressionfunction.md) > [accepts](./kibana-plugin-plugins-expressions-server.expressionfunction.accepts.md) ## ExpressionFunction.accepts property Signature: ```typescript accepts: (type: string) => boolean; ```