⚡ Make it possible to extent the argument product types

cloud-core/src/main/java/com/intellectualsites/commands/arguments/compound/ArgumentPair.java

@@ -43,7 +43,18 @@ import java.util.function.Function;
  */
 public final class ArgumentPair<C, U, V, O> extends CompoundArgument<Pair<U, V>, C, O> {
 
-    private ArgumentPair(final boolean required,
+    /**
+     * Create a new argument pair.
+     *
+     * @param required   Whether or not the argument is required
+     * @param name       The argument name
+     * @param names      Names of the sub-arguments (in order)
+     * @param types      Types of the sub-arguments (in order)
+     * @param parserPair The sub arguments
+     * @param mapper     Mapper that maps the sub-arguments to the output type
+     * @param valueType  The output type
+     */
+    protected ArgumentPair(final boolean required,
                            @Nonnull final String name,
                            @Nonnull final Pair<String, String> names,
                            @Nonnull final Pair<Class<U>, Class<V>> types,

cloud-core/src/main/java/com/intellectualsites/commands/arguments/compound/ArgumentTriplet.java

@@ -44,7 +44,18 @@ import java.util.function.Function;
  */
 public final class ArgumentTriplet<C, U, V, W, O> extends CompoundArgument<Triplet<U, V, W>, C, O> {
 
-    private ArgumentTriplet(final boolean required,
+    /**
+     * Create a new argument triplet.
+     *
+     * @param required      Whether or not the argument is required
+     * @param name          The argument name
+     * @param names         Names of the sub-arguments (in order)
+     * @param types         Types of the sub-arguments (in order)
+     * @param parserTriplet The sub arguments
+     * @param mapper        Mapper that maps the sub-arguments to the output type
+     * @param valueType     The output type
+     */
+    protected ArgumentTriplet(final boolean required,
                               @Nonnull final String name,
                               @Nonnull final Triplet<String, String, String> names,
                               @Nonnull final Triplet<Class<U>, Class<V>, Class<W>> types,