[Home](./index.md) > [kibana-plugin-plugins-expressions-server](./kibana-plugin-plugins-expressions-server.md) > [ExpressionFunction](./kibana-plugin-plugins-expressions-server.expressionfunction.md) > [migrations](./kibana-plugin-plugins-expressions-server.expressionfunction.migrations.md) ## ExpressionFunction.migrations property Signature: ```typescript migrations: { [key: string]: (state: SerializableState) => SerializableState; }; ```