# Method use to define the signature part of the method `ASignature` and `MSignature`
	# The given `mcontract` provided `adapt_nsignature` and `adapt_msignature` to copy and adapt the given signature (`nsignature` and `msignature`)
	fun define_signature(mcontract: MContract, nsignature: nullable ASignature, msignature: nullable MSignature)
	do
		if nsignature != null and msignature != null then nsignature.ret_type = msignature.return_mtype
		self.n_signature = mcontract.adapt_nsignature(nsignature)
		self.m_signature = mcontract.adapt_msignature(msignature)
	end