public static boolean isConstraint(BinaryReader reader) throws IOException {
			return (reader.peekNextByte() == CliElementType.ELEMENT_TYPE_PINNED.id());
		}
This is the method that subclasses should override. If stream is null, the method must not cause a NullPointerException,
i.e. it must handle this as if there was no stream to begin with.
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/pe/cli/blobs/CliAbstractSig.java