func (p *PUBCOMP) setVariableHeader() {
	p.variableHeader = append(p.variableHeader, encodeUint16(p.PacketID)...)
}
setVariableHeader sets the variable header to the Packet.
package packet
const lenPUBCOMPFixedHeader = 2
const lenPUBCOMPVariableHeader = 2
type PUBCOMP struct {
	base
	PacketID uint16
}
func (p *PUBCOMP) setFixedHeader() {
	p.fixedHeader = append(p.fixedHeader, TypePUBCOMP<<4)
	p.appendRemainingLength()
}