func (t *Tracer) Pop() {
	// check list
	if len(t.spans) == 0 {
		return
	}

	// finish last span
	t.Last().Finish()

	// resize slice
	t.spans = t.spans[:len(t.spans)-1]
}
func (t *Tracer) Pop() {
	
	if len(t.spans) == 0 {
		return
	}

	
	t.Last().Finish()

	
	t.spans = t.spans[:len(t.spans)-1]
}
func ( t * Tracer ) Pop ( ) { // check list if len ( t . spans ) == 0 { return } // finish last span t . Last ( ) . Finish ( ) // resize slice t . spans = t . spans [ : len ( t . spans ) - 1 ] }
// Pop finishes and removes the last pushed span.
Pop finishes and removes the last pushed span .