message: DOC: document how to get an umpire::Allocator
  Document how to retrieve the corresponding Umpire allocator given
  the allocator ID.
diff: @@ -66,13 +66,17 @@ inline void setDefaultAllocator( int allocatorID )
  /*!
  * \brief Returns the current default memory space used.
  + * \note If Umpire is used, the corresponding umpire allocator can be retrieved by:
  + * <code>
  + * umpire::Allocator alloc = umpire::ResourceManager::getInstance().getAllocator( allocID );
  + * </code>
  */
  inline int getDefaultAllocatorID()
  {
  #ifdef AXOM_USE_UMPIRE
  return umpire::ResourceManager::getInstance().getDefaultAllocator().getId();
  #else
  - return DEFAULT_ALLOCATOR_ID;
  + return axom::DEFAULT_ALLOCATOR_ID;
  #endif
  }
  