Not sure why we have a (non static) XmlSchema#serializeInternal(XmlSchema, Writer, Map<String,String>) method. That doesn't look like proper OO design. Remove the XmlSchema parameter and instead use "this".

git-svn-id: https://svn.apache.org/repos/asf/webservices/xmlschema/trunk@1551645 13f79535-47bb-0310-9956-ffa450edef68