code: public Change create(String name) {
          Change plugin = getPlugin(name);
          if (plugin == null) {
              return null;
          }
          try {
              return plugin.getClass().getConstructor().newInstance();
          } catch (Exception e) {
              throw new UnexpectedLiquibaseException(e);
          }
      }
docs: Create a new Change implementation for the given change name. The class of the constructed object will be the Change implementation with the highest priority.
  Each call to create will return a new instance of the Change.