Document.optionSelector
MaybeNullElement!SomeElementType optionSelector(SomeElementType = Element)(string selector, string file = __FILE__, size_t line = __LINE__) if(is(SomeElementType : Element))ditto
MaybeNullElement!SomeElementType optionSelector(SomeElementType = Element)(string selector, string file = __FILE__, size_t line = __LINE__) if(is(SomeElementType : Element))ditto