protected override void Initialize()

in src/Serialization/SerializableType.cs [537:604]
64 lines of code
16 McCabe index (conditional complexity)

            protected override void Initialize(ByteBuffer buffer, FormatCode formatCode,
                out int size, out int count, out int encodeWidth, out Collection effectiveType)
            {
                if (formatCode != FormatCode.Described)
                {
                    throw new AmqpException(AmqpErrorCode.InvalidField, AmqpResources.GetString(AmqpResources.AmqpInvalidFormatCode, formatCode, buffer.Offset));
                }

                effectiveType = null;
                formatCode = AmqpEncoding.ReadFormatCode(buffer);
                ulong? code = null;
                AmqpSymbol symbol = default(AmqpSymbol);
                if (formatCode == FormatCode.ULong0)
                {
                    code = 0;
                }
                else if (formatCode == FormatCode.ULong || formatCode == FormatCode.SmallULong)
                {
                    code = ULongEncoding.Decode(buffer, formatCode);
                }
                else if (formatCode == FormatCode.Symbol8 || formatCode == FormatCode.Symbol32)
                {
                    symbol = SymbolEncoding.Decode(buffer, formatCode);
                }

                if (this.AreEqual(this.descriptorCode, this.descriptorName, code, symbol))
                {
                    effectiveType = this;
                }
                else if (this.knownTypes != null)
                {
                    for (int i = 0; i < this.knownTypes.Count; ++i)
                    {
                        Composite knownType = (Composite)this.serializer.GetType(this.knownTypes[i]);
                        if (this.AreEqual(knownType.descriptorCode, knownType.descriptorName, code, symbol))
                        {
                            effectiveType = knownType;
                            break;
                        }
                    }
                }

                if (effectiveType == null)
                {
                    throw new SerializationException(AmqpResources.GetString(AmqpResources.AmqpUnknownDescriptor, code ?? (object)symbol.Value, this.type.Name));
                }

                formatCode = AmqpEncoding.ReadFormatCode(buffer);
                if (this.Code == FormatCode.List32)
                {
                    if (formatCode == FormatCode.List0)
                    {
                        size = count = encodeWidth = 0;
                    }
                    else
                    {
                        encodeWidth = formatCode == FormatCode.List8 ? FixedWidth.UByte : FixedWidth.UInt;
                        AmqpEncoding.ReadSizeAndCount(buffer, formatCode, FormatCode.List8,
                            FormatCode.List32, out size, out count);
                    }
                }
                else
                {
                    encodeWidth = formatCode == FormatCode.Map8 ? FixedWidth.UByte : FixedWidth.UInt;
                    AmqpEncoding.ReadSizeAndCount(buffer, formatCode, FormatCode.Map8,
                        FormatCode.Map32, out size, out count);
                }
            }