import java.util.Map;
import java.util.TreeMap;
+/**
+ * A category grouping a set of {@link A2Component}, typically based on the
+ * provider of these components. This is the equivalent of Maven's group Id.
+ */
class A2Contribution implements Comparable<A2Contribution> {
final static String BOOT = "boot";
final static String RUNTIME = "runtime";
+ final static String CLASSPATH = "classpath";
private final ProvisioningSource source;
private final String id;