[Home](./index.md) > [kibana-plugin-plugins-expressions-public](./kibana-plugin-plugins-expressions-public.md) > [Execution](./kibana-plugin-plugins-expressions-public.execution.md) ## Execution class Signature: ```typescript export declare class Execution = Record, Input = unknown, Output = unknown, InspectorAdapters extends Adapters = ExtraContext['inspectorAdapters'] extends object ? ExtraContext['inspectorAdapters'] : DefaultInspectorAdapters> ``` ## Constructors | Constructor | Modifiers | Description | | --- | --- | --- | | [(constructor)(params)](./kibana-plugin-plugins-expressions-public.execution._constructor_.md) | | Constructs a new instance of the Execution class | ## Properties | Property | Modifiers | Type | Description | | --- | --- | --- | --- | | [context](./kibana-plugin-plugins-expressions-public.execution.context.md) | | ExecutionContext<Input, InspectorAdapters> & ExtraContext | Execution context - object that allows to do side-effects. Context is passed to every function. | | [contract](./kibana-plugin-plugins-expressions-public.execution.contract.md) | | ExecutionContract<ExtraContext, Input, Output, InspectorAdapters> | Contract is a public representation of Execution instances. Contract we can return to other plugins for their consumption. | | [expression](./kibana-plugin-plugins-expressions-public.execution.expression.md) | | string | | | [input](./kibana-plugin-plugins-expressions-public.execution.input.md) | | Input | Initial input of the execution.N.B. It is initialized to null rather than undefined for legacy reasons, because in legacy interpreter it was set to null by default. | | [inspectorAdapters](./kibana-plugin-plugins-expressions-public.execution.inspectoradapters.md) | | InspectorAdapters | | | [params](./kibana-plugin-plugins-expressions-public.execution.params.md) | | ExecutionParams<ExtraContext> | | | [result](./kibana-plugin-plugins-expressions-public.execution.result.md) | | Promise<Output | ExpressionValueError> | | | [state](./kibana-plugin-plugins-expressions-public.execution.state.md) | | ExecutionContainer<Output | ExpressionValueError> | Dynamic state of the execution. | ## Methods | Method | Modifiers | Description | | --- | --- | --- | | [cancel()](./kibana-plugin-plugins-expressions-public.execution.cancel.md) | | Stop execution of expression. | | [cast(value, toTypeNames)](./kibana-plugin-plugins-expressions-public.execution.cast.md) | | | | [interpret(ast, input, options)](./kibana-plugin-plugins-expressions-public.execution.interpret.md) | | | | [invokeChain(chainArr, input)](./kibana-plugin-plugins-expressions-public.execution.invokechain.md) | | | | [invokeFunction(fn, input, args)](./kibana-plugin-plugins-expressions-public.execution.invokefunction.md) | | | | [resolveArgs(fnDef, input, argAsts)](./kibana-plugin-plugins-expressions-public.execution.resolveargs.md) | | | | [start(input)](./kibana-plugin-plugins-expressions-public.execution.start.md) | | Call this method to start execution.N.B. input is initialized to null rather than undefined for legacy reasons, because in legacy interpreter it was set to null by default. |