fetch/fetch.go
func (p EnableParams) WithPatterns(patterns []*RequestPattern) *EnableParams {
	p.Patterns = patterns
	return &p
}
func (p EnableParams) WithPatterns(patterns []*RequestPattern) *EnableParams {
	p.Patterns = patterns
	return &p
}
// WithPatterns if specified, only requests matching any of these patterns
// will produce fetchRequested event and will be paused until clients response.
// If not set, all requests will be affected.