find.go
func (f *FindFilter) IfMode(fn func(os.FileMode) bool) *FindFilter {
	f.ifmode = fn
	return f
}
func (f *FindFilter) IfMode(fn func(os.FileMode) bool) *FindFilter {
	f.ifmode = fn
	return f
}
func ( f * FindFilter ) IfMode ( fn func ( os . FileMode ) bool ) * FindFilter { f . ifmode = fn return f }
// IfMode adjusts f so it only matches nodes for which fn(mode) returns true.
IfMode adjusts f so it only matches nodes for which fn ( mode ) returns true .