code: public Set<ResourceSelection> getSelections(final String catalog, final String name) {
  		Set<ResourceSelection> result = new HashSet<>();
  		for (ResourceSelection selection : selections) {
  			if (selection.getCatalog().equals(catalog) && selection.getName().equals(name)) {
  				result.add(selection);
  			}
  		}
  		return result;
  	}
docs: 选择某类别的特定名称资源。
  
  @param catalog
  类别
  @param name
  名称
  @return 资源选择