protected StructureDataType getBaseStructure(String name) {
		StructureDataType structure = new StructureDataType(name + "|" + attributeLength + "|", 0);
		structure.add(WORD, "attribute_name_index", null);
		structure.add(DWORD, "attribute_length", null);
		return structure;
	}
The value of the attribute_length item indicates the length of the attribute,
excluding the initial six bytes. 
The value of the attribute_length item is thus dependent on the specific
attribute.
@return the length of the attribute, excluding the initial six bytes
Ghidra/Processors/JVM/src/main/java/ghidra/javaclass/format/attributes/AbstractAttributeInfo.java