ExtensionElementCreator

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface ExtensionElementCreator
```
Interface ExtensionElementCreator.
A Factory for user-defined nodes in the stylesheet tree.

An instance of this class is registered with the Configuration to process all extension elements in a particular namespace.

This interface is a replacement for ExtensionElementFactory, which remains available for the time being.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`StyleElement`	`createExtensionElement(java.lang.String localname)`	Create a StyleElement to be used for stylesheet elements with a given local name.

- Method Detail
  - createExtensionElement
```
StyleElement createExtensionElement(java.lang.String localname)
```
    Create a StyleElement to be used for stylesheet elements with a given local name.
    
    Parameters:
    
    localname - the local name of the element
    
    Returns:
    
    null if the local name is not a recognised element type in this namespace.