tracer.go
func (t Tags) Apply(o *StartSpanOptions) {
	if o.Tags == nil {
		o.Tags = make(map[string]interface{})
	}
	for k, v := range t {
		o.Tags[k] = v
	}
}
func (t Tags) Apply(o *StartSpanOptions) {
	if o.Tags == nil {
		o.Tags = make(map[string]interface{})
	}
	for k, v := range t {
		o.Tags[k] = v
	}
}
func ( t Tags ) Apply ( o * StartSpanOptions ) { if o . Tags == nil { o . Tags = make ( map [ string ] interface { } ) } for k , v := range t { o . Tags [ k ] = v } }
// Apply satisfies the StartSpanOption interface.
Apply satisfies the StartSpanOption interface .