Clearing the buffer in LineReader

[naotoj]

Hi,

Would it be possible to have some means to clear the underlying buffer used in LineReader? For some time, Console implementation in the OpenJDK uses JLine underneath, and there is a need to clear the contents in the buffer within JLine, such as reading the password input. We have implemented it in an ad-hoc way:
openjdk/jdk@bd04f91
openjdk/jdk@4ed38f5

It would be appreciated if this kind of functionality is added in LineReader