> For the complete documentation index, see [llms.txt](https://hiveminddocs.gitbook.io/hivemind/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hiveminddocs.gitbook.io/hivemind/code-systems/ultimate-building-system-framework-ubs/buildable/dependencies.md).

# Dependencies

### Dependencies

Dependencies allow you to define conditions that a buildable relies on to avoid being destroyed. To implement a dependency, subclass the `UBF_Dependency` class and override the `Name` function to set up the logic. If the function returns `true`, the dependency passes; if it returns `false`, the buildable will be destroyed.

## Properties:

* `bIsMandatory`\
  Determines whether this dependency is required for success.
  * `True`\
    This dependency must pass. If it fails, the entire check fails, regardless of other dependencies.
  * `False`\
    This dependency can fail as long as other dependencies succeed.
* `OwningBuildable`\
  Holds a reference to the buildable that owns this dependency.

## Functions:

* `IsMandatory()`\
  Returns whether the dependency is mandatory for the buildable.
* `DependencyCondition()`\
  Override this function to define the specific condition for the dependency. It returns `true` if the dependency passes, and `false` if it fails.
* `InitializeDependency()`\
  Used to initialize any specific logic for the dependency. By default, this function does nothing unless overridden. You should set up bindings for other delegates or event dispatchers here.


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