code: public static CollisionConfig imports(Configurer configurer)
      {
          Check.notNull(configurer);
  
          final Map<String, Collision> collisions = new HashMap<>(0);
  
          for (final Xml node : configurer.getRoot().getChildren(NODE_COLLISION))
          {
              final String coll = node.readString(ATT_NAME);
              final Collision collision = createCollision(node);
              collisions.put(coll, collision);
          }
  
          return new CollisionConfig(collisions);
      }
docs: Create the collision data from node.
  
  @param configurer The configurer reference (must not be <code>null</code>).
  @return The collisions data.
  @throws LionEngineException If unable to read node.