code: @Override
  	public T getPluginOrDefaultFor(S delimiter, Supplier<T> defaultSupplier) {
  
  		Assert.notNull(delimiter, "Delimiter must not be null!");
  		Assert.notNull(defaultSupplier, "Default supplier must not be null!");
  
  		return getPluginFor(delimiter).orElseGet(defaultSupplier);
  	}
docs: /*
  (non-Javadoc)
  @see org.springframework.plugin.core.PluginRegistry#getPluginOrDefaultFor(java.lang.Object, java.util.function.Supplier)