code: public static boolean isInnerClassAccess(INVOKESTATIC inv, ConstantPoolGen cpg) {
          String methodName = inv.getName(cpg);
          return methodName.startsWith("access$");
      }
docs: Determine whether the given INVOKESTATIC instruction is an inner-class
  field accessor method.
  
  @param inv
  the INVOKESTATIC instruction
  @param cpg
  the ConstantPoolGen for the method
  @return true if the instruction is an inner-class field accessor, false
  if not