public void ReadFromStream()

in Facebook.Unity.Editor/iOS/PBXProjectData.cs [503:571]
59 lines of code
10 McCabe index (conditional complexity)

        public void ReadFromStream(TextReader sr)
        {
            Clear();
            m_RootElements = ParseContent(sr.ReadToEnd());

            if (!m_RootElements.Contains("objects"))
                throw new Exception("Invalid PBX project file: no objects element");

            var objects = m_RootElements["objects"].AsDict();
            m_RootElements.Remove("objects");
            m_RootElements.SetString("objects", "OBJMARKER");

            if (m_RootElements.Contains("objectVersion"))
            {
                m_ObjectVersion = m_RootElements["objectVersion"].AsString();
                m_RootElements.Remove("objectVersion");
            }

            var allGuids = new List<string>();
            string prevSectionName = null;
            foreach (var kv in objects.values)
            {
                allGuids.Add(kv.Key);
                var el = kv.Value;

                if (!(el is PBXElementDict) || !el.AsDict().Contains("isa"))
                {
                    m_UnknownObjects.values.Add(kv.Key, el);
                    continue;
                }
                var dict = el.AsDict();
                var sectionName = dict["isa"].AsString();

                if (m_Section.ContainsKey(sectionName))
                {
                    var section = m_Section[sectionName];
                    section.AddObject(kv.Key, dict);
                }
                else
                {
                    UnknownSection section;
                    if (m_UnknownSections.ContainsKey(sectionName))
                        section = m_UnknownSections[sectionName];
                    else
                    {
                        section = new UnknownSection(sectionName);
                        m_UnknownSections.Add(sectionName, section);
                    }
                    section.AddObject(kv.Key, dict);

                    // update section order
                    if (!m_SectionOrder.Contains(sectionName))
                    {
                        int pos = 0;
                        if (prevSectionName != null)
                        {
                            // this never fails, because we already added any previous unknown sections
                            // to m_SectionOrder
                            pos = m_SectionOrder.FindIndex(x => x == prevSectionName);
                            pos += 1;
                        }
                        m_SectionOrder.Insert(pos, sectionName);
                    }
                }
                prevSectionName = sectionName;
            }
            RepairStructure(allGuids);
            RefreshAuxMaps();
        }