docs: @Nonnull
      public BugInstance addSourceLine(ClassContext classContext, Method method, InstructionHandle handle) {
          SourceLineAnnotation sourceLineAnnotation = SourceLineAnnotation.fromVisitedInstruction(classContext, method,
                  handle.getPosition());
          if (sourceLineAnnotation != null) {
              add(sourceLineAnnotation);
          }
          return this;
      }