semantic-before-toplevel-cache-flush-hook

semantic-before-toplevel-cache-flush-hook is a variable defined in `semantic.el'.
Its value is

(semantic-edits-flush-changes)

• This variable may be risky if used as a file-local variable.

Documentation:
Hooks run before the toplevel tag cache is flushed.
For language specific hooks, make sure you define this as a local
hook. This hook is called before a corresponding
`semantic-after-toplevel-cache-change-hook' which is also called
during a flush when the cache is given a new value of nil.