package javax.lang missing in OpenJDK sources

[Ulf Zibis]

Hi,

in class java.lang.Character in javadoc of method 
isJavaIdentifierStart(char ch) I find reference:
@see    javax.lang.model.SourceVersion#isIdentifier(CharSequence)

But there is no package javax.lang in OpenJDK sources. =-O

-Ulf