# File lib/maruku/ext/math/mathml_engines/itex2mml.rb, line 4
        def convert_to_mathml_itex2mml(kind, tex)
                begin
                        if not $itex2mml_parser
                                require 'itextomml'
                                $itex2mml_parser =  Itex2MML::Parser.new
                        end
                        
                        itex_method = {:equation=>:block_filter,:inline=>:inline_filter}
                        
                        mathml =  $itex2mml_parser.send(itex_method[kind], tex)
                        doc = Document.new(mathml, {:respect_whitespace =>:all}).root
                        return doc
                rescue LoadError => e
                        maruku_error "Could not load package 'itex2mml'.\n"+ "Please install it."                    unless $already_warned_itex2mml 
                        $already_warned_itex2mml = true
                rescue REXML::ParseException => e
                        maruku_error "Invalid MathML TeX: \n#{add_tabs(tex,1,'tex>')}"+
                                "\n\n #{e.inspect}"
                rescue 
                        maruku_error "Could not produce MathML TeX: \n#{tex}"+
                                "\n\n #{e.inspect}"
                end
                nil
        end