Function Tag.toSDLString
Output this entire tag in SDL format. Does *not* treat 'this' as
a root tag. If you intend this to be the root of a standard SDL
document, use 'toSDLDocument
' instead.
Prototypes
string toSDLString()( string indent = "\x09", int indentLevel = 0 ); void toSDLString(Sink)( ref Sink sink, string indent = "\x09", int indentLevel = 0 ) if (isOutputRange!(Sink, char));