Configuration
An configuration is a function used in sequences to set the configuration context.
The actual code of the configuration must be in the override of the Configure() method. The method must return a context that will be used as the configuration context of the parent sequence. The configuration can also perform various operations on the sequence while executing the code of the method.
Note
In Unity, it's better to use the SafeConfigure() method to ensure the code is executed in Unity's thread
An example can be found on the create configuration page.