public int getModuleVersionIndex() {
		return module_version_index & 0xffff;
	}
The value of the {@code module_version_index} item must be either zero or a valid index
into the constant pool table.  If the value is zero, no version information about the
current module is present. If the value is nonzero, the constant pool entry at that index
must be a {@link ConstantPoolUtf8Info} structure representing the version of the current module.
@return the module version index.
Ghidra/Processors/JVM/src/main/java/ghidra/javaclass/format/attributes/ModuleAttribute.java