speedbar-add-ignored-directory-regexp
speedbar-add-ignored-directory-regexp is an interactive compiled Lisp function in `speedbar.el
'.
(speedbar-add-ignored-directory-regexp DIRECTORY-EXPRESSION)
Add DIRECTORY-EXPRESSION as a new ignored directory for speedbar tracking.
This function will modify `speedbar-ignored-directory-regexp' and add
DIRECTORY-EXPRESSION to `speedbar-ignored-directory-expressions'.