func (lay TCPLayer) GetTCPHeader() *layers.TCP {
	return lay.Header
}
GetTCPHeader returns the gopacket's layers.TCP layer from the custom TCPLayer abstraction
package helpers
import "github.com/google/gopacket/layers"
type IPv4Layer struct {
	Header *layers.IPv4
}
type IPv6Layer struct {
	Header *layers.IPv6
}
func (lay IPv4Layer) GetIPv4Header() *layers.IPv4 {
	return lay.Header
}
func (lay IPv6Layer) GetIPv6Header() *layers.IPv6 {
	return lay.Header
}
type UDPLayer struct {
	Header *layers.UDP
}
func (lay UDPLayer) GetUDPHeader() *layers.UDP {
	return lay.Header
}
type TCPLayer struct {
	Header *layers.TCP
}