Fixes and Refactor

Author: JoTurk

candidate.go

@@ -56,19 +56,17 @@ type Candidate interface {
 	// In the order of insertion, *(key value).
 	// Extension attributes are defined in RFC 5245, Section 15.1:
 	// https://datatracker.ietf.org/doc/html/rfc5245#section-15.1
-	Extensions() []string
-
-	// GetExtension retrieves the value of a specific extension attribute for the ICECandidate.
-	// Extension attributes are defined in RFC 5245, Section 15.1:
-	// https://datatracker.ietf.org/doc/html/rfc5245#section-15.1
-	GetExtension(name string) (value string, ok bool)
+	Extensions() CandidateExtensions
 
 	String() string
 	Type() CandidateType
 	TCPType() TCPType
 
 	Equal(other Candidate) bool
 
+	// DeepEqual same as Equal, But it also compares the candidate extensions.
+	DeepEqual(other Candidate) bool
+
 	Marshal() string
 
 	addr() net.Addr