yaml_initialize

# File lib/yaml/types.rb, line 86
        def yaml_initialize( tag, val )
            if Array === val
                val.each do |v|
                    if Hash === v
                        concat( v.to_a )                # Convert the map to a sequence
                    else
                        raise YAML::Error, "Invalid !omap entry: " + val.inspect
                    end
                end
            else
                raise YAML::Error, "Invalid !omap: " + val.inspect
            end
            self
        end