# Hierarchy

![](../docs/images/hierarchy.png)

### Vision
* function `getPropertyValue(name: Name, inherit: Boolean = false, includeStyles: Boolean = true, includeDefaults: Boolean = true)` - get property value with given layer flags.

* function `setProperty(name: Name, item: Any?)` - a convenient method to set property node or value. If `item` is null, then node is removed, not a value
Sets the `item` property to the element with the `name` identification.

### VisionBase

Basic vision implementation

### VisionGroup

A group of Visions.

### MutableVisionGroup

Mutable version of VisionGroup.

low structure changes of this group. Unconsumed changes are discarded.

### Solid

Interface for 3-dimensional Vision.

### SolidGroup

* function `getPrototype(name: Name)` - get a prototype redirecting the request to the parent if prototype is not found. If prototype is a ref, then it is unfolded automatically.

* function `prototypes(builder: VisionContainerBuilder<Solid>.() -> Unit)` - create or edit prototype node as a group. 

### SolidReferenceGroup

A reference Solid to reuse a template object.

### RootVisionGroup

Non-serializable root group used to propagate manager to its children.

* function Vision.root(manager: VisionManager) - designate this [VisionGroup] as a root group and assign a [VisionManager] as its parent.