code: @Nonnull
      public BugInstance addMethod(JavaClassAndMethod classAndMethod) {
          return addMethod(classAndMethod.getJavaClass(), classAndMethod.getMethod());
      }
docs: Add a method annotation. If this is the first method annotation added, it
  becomes the primary method annotation. If the method has source line
  information, then a SourceLineAnnotation is added to the method.
  
  @param classAndMethod
  JavaClassAndMethod identifying the method to add
  @return this object