Defines UxmlTraits for the <Template> tag.
| uxmlChildElementsDescription | Returns an empty enumerable because <Template> cannot have children. |
| UxmlTemplateTraits | コンストラクター |
| canHaveAnyAttribute | Must return true if the UXML element attributes are not restricted to the values enumerated by uxmlAttributesDescription. |
| uxmlAttributesDescription | Describes the UXML attributes expected by the element. The attributes enumerated here will appear in the UXML schema. |
| uxmlChildElementsDescription | Describes the types of element that can appear as children of this element in a UXML file. |
| Init | Initialize a VisualElement instance with values from the UXML element attributes. |