public int getNumberOfInnerClasses() {
		return numberOfInnerClasses & 0xffff;
	}
The value of the number_of_classes item indicates the number of entries in
the classes array.
@return the number of entries in the classes array
Ghidra/Processors/JVM/src/main/java/ghidra/javaclass/format/attributes/InnerClassesAttribute.java