This package contains classes which are wrappers for opcode instructions contained in the `code` field of a `Code` attribute structure. These classes are not generated when reading the `org.gjt.jclasslib.structures.ClassFile` structure via the `org.gjt.jclasslib.io.ClassFileReader`, they have to be created through the `org.gjt.jclasslib.io.ByteCodeReader` and converted back to bytecode with the `org.gjt.jclasslib.io.ByteCodeWriter`.