Bug 299536 API refers to non-API type UIResourceFilterDescription
I20100112 CreateGroupOperation and CreateFolderOperation have constructors that require a UIResourceFilterDescription[]. However this is a non-API type, so clients can't reference it without using internals. Either the constructor should be removed or something like UIResourceFilterDescription needs to be promoted to API. Also, shouldn't CreateFolderOperation be renamed CreateVirtualFolderOperation?
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/dialogs/ResourceFilterGroup.java
}
	public void setProject(IProject project) {
		this.project = project;
	}
	public void setType(int type) {
		this.type = type;
	}
	public boolean hasStringArguments() {
		IFilterMatcherDescriptor descriptor = FilterTypeUtil.getDescriptor(id);
		if (descriptor != null)
			return descriptor.getArgumentType().equals(
					IFilterMatcherDescriptor.ARGUMENT_TYPE_STRING);
		return false;
	}
	public int getChildrenLimit() {
		IFilterMatcherDescriptor descriptor = FilterTypeUtil.getDescriptor(id);
		if (descriptor != null) {
			if (descriptor.getArgumentType().equals(
					IFilterMatcherDescriptor.ARGUMENT_TYPE_FILTER_MATCHER))
				return 1;
			if (descriptor.getArgumentType().equals(
					IFilterMatcherDescriptor.ARGUMENT_TYPE_FILTER_MATCHERS))
				return Integer.MAX_VALUE;
		}
		return 0;
	}
	public boolean equals(Object o) {
		if (!(o instanceof FilterCopy))
			return false;
		FilterCopy filter = (FilterCopy) o;