```
public interface SourceListExpansionListener
```
An interface for listening for expansion events. It handles expansion events for both SourceListItem and SourceListCategory.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`shouldCollapseSourceListItem(SourceListItem item)`	Called before collapsing a `SourceListItem` in a `SourceList`.
`boolean`	`shouldExpandSourceListCategory(SourceListCategory category)`	Called before expanding a `SourceListCategory` in a `SourceList`.
`boolean`	`shouldExpandSourceListItem(SourceListItem item)`	Called before expanding a `SourceListItem` in a `SourceList`.
`boolean`	`shouldToCollapseSourceListCategory(SourceListCategory category)`	Called before collapsing a `SourceListCategory` in a `SourceList`.
`void`	`sourceListCategoryCollapsed(SourceListCategory category)`	Called when a `SourceListCategory` is collapsed in a `SourceList`.
`void`	`sourceListCategoryExpanded(SourceListCategory category)`	Called when a `SourceListCategory` is expanded in a `SourceList`.
`void`	`sourceListItemCollapsed(SourceListItem item)`	Called when a `SourceListItem` is collapsed in a `SourceList`.
`void`	`sourceListItemExpanded(SourceListItem item)`	Called when a `SourceListItem` is expanded in a `SourceList`.

- Method Detail
  - shouldExpandSourceListItem
```
boolean shouldExpandSourceListItem(SourceListItem item)
```
    Called before expanding a SourceListItem in a SourceList. Determines whether an item is allowed to be expanded or not
    
    Parameters:
    
    item - the item that requests to be expanded.
    
    Returns:
    
    true if the item is expandable, false otherwise
  - sourceListItemExpanded
```
void sourceListItemExpanded(SourceListItem item)
```
    Called when a SourceListItem is expanded in a SourceList. The method will only be called if shouldExpandSourceListItem(SourceListItem) returns true.
    
    Parameters:
    
    item - the item that was expanded.
  - shouldCollapseSourceListItem
```
boolean shouldCollapseSourceListItem(SourceListItem item)
```
    Called before collapsing a SourceListItem in a SourceList. Determines whether an item is allowed to be collapsed or not
    
    Parameters:
    
    item - the item that requests to be collapsed.
    
    Returns:
    
    true if the item is collapsable, false otherwise
  - sourceListItemCollapsed
```
void sourceListItemCollapsed(SourceListItem item)
```
    Called when a SourceListItem is collapsed in a SourceList. The method will only be called if shouldCollapseSourceListItem(SourceListItem) returns true.
    
    Parameters:
    
    item - the item that was collapsed.
  - shouldExpandSourceListCategory
```
boolean shouldExpandSourceListCategory(SourceListCategory category)
```
    Called before expanding a SourceListCategory in a SourceList. Determines whether a category is allowed to be expanded or not
    
    Parameters:
    
    category - the category that requests to be expanded.
    
    Returns:
    
    true if the item is expandable, false otherwise
  - sourceListCategoryExpanded
```
void sourceListCategoryExpanded(SourceListCategory category)
```
    Called when a SourceListCategory is expanded in a SourceList. The method will only be called if shouldExpandSourceListCategory(SourceListCategory) returns true.
    
    Parameters:
    
    category - the category that was expanded.
  - shouldToCollapseSourceListCategory
```
boolean shouldToCollapseSourceListCategory(SourceListCategory category)
```
    Called before collapsing a SourceListCategory in a SourceList. Determines whether a category is allowed to be collapsed or not
    
    Parameters:
    
    category - the category that requests to be collapsed.
    
    Returns:
    
    true if the item is collapsable, false otherwise
  - sourceListCategoryCollapsed
```
void sourceListCategoryCollapsed(SourceListCategory category)
```
    Called when a SourceListCategory is collapsed in a SourceList. The method will only be called if shouldToCollapseSourceListCategory(SourceListCategory) returns true.
    
    Parameters:
    
    category - the category that was collapsed.

Interface SourceListExpansionListener

Method Summary

Method Detail

shouldExpandSourceListItem

sourceListItemExpanded

shouldCollapseSourceListItem

sourceListItemCollapsed

shouldExpandSourceListCategory

sourceListCategoryExpanded

shouldToCollapseSourceListCategory

sourceListCategoryCollapsed