public static bool DrawHeader()

in unity/Assets/PostProcessingV2/Editor/Utils/EditorUtilities.cs [165:230]
46 lines of code
7 McCabe index (conditional complexity)

        public static bool DrawHeader(string title, SerializedProperty group, SerializedProperty activeField, PostProcessEffectSettings target, Action resetAction, Action removeAction)
        {
            Assert.IsNotNull(group);
            Assert.IsNotNull(activeField);
            Assert.IsNotNull(target);

            var backgroundRect = GUILayoutUtility.GetRect(1f, 17f);

            var labelRect = backgroundRect;
            labelRect.xMin += 16f;
            labelRect.xMax -= 20f;

            var toggleRect = backgroundRect;
            toggleRect.y += 2f;
            toggleRect.width = 13f;
            toggleRect.height = 13f;

            var menuIcon = EditorGUIUtility.isProSkin
                ? Styling.paneOptionsIconDark
                : Styling.paneOptionsIconLight;

            var menuRect = new Rect(labelRect.xMax + 4f, labelRect.y + 4f, menuIcon.width, menuIcon.height);

            // Background rect should be full-width
            backgroundRect.xMin = 0f;
            backgroundRect.width += 4f;

            // Background
            float backgroundTint = EditorGUIUtility.isProSkin ? 0.1f : 1f;
            EditorGUI.DrawRect(backgroundRect, new Color(backgroundTint, backgroundTint, backgroundTint, 0.2f));

            // Title
            using (new EditorGUI.DisabledScope(!activeField.boolValue))
                EditorGUI.LabelField(labelRect, GetContent(title), EditorStyles.boldLabel);

            // Active checkbox
            activeField.serializedObject.Update();
            activeField.boolValue = GUI.Toggle(toggleRect, activeField.boolValue, GUIContent.none, Styling.smallTickbox);
            activeField.serializedObject.ApplyModifiedProperties();

            // Dropdown menu icon
            GUI.DrawTexture(menuRect, menuIcon);

            // Handle events
            var e = Event.current;

            if (e.type == EventType.MouseDown)
            {   
                if (menuRect.Contains(e.mousePosition))
                {
                    ShowHeaderContextMenu(new Vector2(menuRect.x, menuRect.yMax), target, resetAction, removeAction);
                    e.Use();
                }
                else if (labelRect.Contains(e.mousePosition))
                {
                    if (e.button == 0)
                        group.isExpanded = !group.isExpanded;
                    else
                        ShowHeaderContextMenu(e.mousePosition, target, resetAction, removeAction);

                    e.Use();
                }
            }

            return group.isExpanded;
        }