# Class ProcessInstanceTree OptimaJet.Workflow.MySQL.ProcessInstanceTree Namespace: [OptimaJet.Workflow.MySQL](https://api.workflowengine.io/mysql/OptimaJet.Workflow.MySQL/) ```csharp public class ProcessInstanceTree : DbObject ``` ## Type Hierarchy - [DbObject](https://api.workflowengine.io/mysql/OptimaJet.Workflow.MySQL/DbObject-TEntity/) - ProcessInstanceTree Current type ## Constructors `public ProcessInstanceTree(int commandTimeout)` ### Parameters | Name | Type | Description | | --- | --- | --- | | `commandTimeout` | `Int32` | | ## Methods `public Task> GetProcessTreeItemsByRootProcessId(MySqlConnection connection, Guid rootProcessId)` ### Parameters | Name | Type | Description | | --- | --- | --- | | `connection` | `MySqlConnection` | | | `rootProcessId` | `Guid` | | ### Returns | Type | Description | | --- | --- | | `Task` | | [Previous MySQLProvider](https://api.workflowengine.io/mysql/OptimaJet.Workflow.MySQL/MySQLProvider/) [Next WorkflowApprovalHistory](https://api.workflowengine.io/mysql/OptimaJet.Workflow.MySQL/WorkflowApprovalHistory/)