def header(type=HeaderNode::UNIVERSAL)
         index = 0
         if type == HeaderNode::LEFT_PAGE
            index = 1
         elsif type == HeaderNode::RIGHT_PAGE
            index = 2
         elsif type == HeaderNode::FIRST_PAGE
            index = 3
         end
         @headers[index]
      end
def header(type=HeaderNode::UNIVERSAL)
         index = 0
         if type == HeaderNode::LEFT_PAGE
            index = 1
         elsif type == HeaderNode::RIGHT_PAGE
            index = 2
         elsif type == HeaderNode::FIRST_PAGE
            index = 3
         end
         @headers[index]
      end
This method fetches a header from a Document object.

 ==== Parameters
 type::  One of the header types defined in the header class. Defaults to
         HeaderNode::UNIVERSAL.