| AcceptsContextTypes | The datatype this command handler accepts for the context when expanding. |
| Command | The level's command. |
| ContextType | The datatype this command handler will output. |
| Issues | Issues encountered during initialization. |
| Level | The placeholder level this object is handling. |
| Parameter | The level's parameter. |
| Settings | The level's parse and expansion settings. |
| Vault | The level's vault. |