code: private Set<MethodIdentifier> findUnhandledProjectMethodIdentifiers(final List<Instruction> instructions, final Set<ProjectMethod> projectMethods) {
          // find own methods
          return instructions.stream().filter(i -> i.getType() == Instruction.InstructionType.INVOKE || i.getType() == Instruction.InstructionType.METHOD_HANDLE)
                  .map(i -> (InvokeInstruction) i).filter(this::isProjectMethod).map(InvokeInstruction::getIdentifier)
                  .filter(i -> projectMethods.stream().noneMatch(m -> m.matches(i)))
                  .collect(Collectors.toSet());
      }
docs: Returns project method identifiers of invoke instructions which are not included in the {@code projectMethods}.
  
  @param instructions   The instructions of the current method
  @param projectMethods All found project methods
  @return The new method identifiers of unhandled project method invoke instructions