[Home](./index.md) > [kibana-plugin-plugins-expressions-server](./kibana-plugin-plugins-expressions-server.md) > [ExpressionAstExpressionBuilder](./kibana-plugin-plugins-expressions-server.expressionastexpressionbuilder.md) > [functions](./kibana-plugin-plugins-expressions-server.expressionastexpressionbuilder.functions.md) ## ExpressionAstExpressionBuilder.functions property Array of each of the `buildExpressionFunction()` instances in this expression. Use this to remove or reorder functions in the expression. Signature: ```typescript functions: ExpressionAstFunctionBuilder[]; ```