[Home](./index.md) > [kibana-plugin-plugins-expressions-server](./kibana-plugin-plugins-expressions-server.md) > [ExpressionFunction](./kibana-plugin-plugins-expressions-server.expressionfunction.md) > [inject](./kibana-plugin-plugins-expressions-server.expressionfunction.inject.md) ## ExpressionFunction.inject property Signature: ```typescript inject: (state: ExpressionAstFunction['arguments'], references: SavedObjectReference[]) => ExpressionAstFunction['arguments']; ```