public ResourceSelection getSelection(final String catalog) {
		checkReload();
		Set<ResourceSelection> result = set.getSelections(catalog);
		return Iterables.getFirst(result, null);
	}
public ResourceSelection getSelection(final String catalog) {
		checkReload();
		Set<ResourceSelection> result = set.getSelections(catalog);
		return Iterables.getFirst(result, null);
	}
public ResourceSelection getSelection ( final String catalog ) { checkReload ( ) ; Set < ResourceSelection > result = set . getSelections ( catalog ) ; return Iterables . getFirst ( result , null ) ; }
选择某类别的默认名称资源。

@param catalog
类别
@return 资源选择
选择某类别的默认名称资源。