code: public DepictionGenerator withAtomValues() {
          if (annotateAtomNum || annotateAtomMap)
              throw new IllegalArgumentException("Can not annotated atom values, atom numbers or maps are already annotated");
          DepictionGenerator copy = new DepictionGenerator(this);
          copy.annotateAtomVal = true;
          return copy;
      }
docs: Display atom values on the molecule or reaction. The values need to be assigned by
  
  <pre>{@code
  atom.setProperty(CDKConstants.COMMENT, myValueToBeDisplayedNextToAtom);
  }</pre>
  
  Note: A depiction can not have both atom numbers and atom maps visible
  (but this can be achieved by manually setting the annotation).
  
  @return new generator for method chaining
  @see #withAtomMapNumbers()
  @see StandardGenerator#ANNOTATION_LABEL