Add note for later

SabreTools.Serialization/Deserializers/PortableExecutable.cs

@@ -100,6 +100,11 @@ namespace SabreTools.Serialization.Deserializers
                     pex.SectionTable[i] = ParseSectionHeader(data);
                 }
 
+                // TODO: Figure out a way to determine the end of the data here
+                // to find hidden things between the end of the section table and
+                // the beginning of the next data block. Some packers and protections
+                // can hide things here, e.g. ActiveMark
+
                 #endregion
 
                 #region COFF Symbol Table and COFF String Table