实验性
Optional properties for Sub Pane property item
可选
Alignment of property items within the pane of the property pane. If undefined, it will default to Left.
Initial expander state of sub pane. If undefined, it will default to false.
Determines layout direction of sub pane property items. If undefined, it will default to Vertical.
Determines if sub pane should have an expander. If undefined, it will default to true.
Adds additional margins to sub pane. If undefined, it will default to true.
Localized title of the property pane
Optional properties for Sub Pane property item