svg/src/main/java/jetbrains/jetpad/projectional/svg/toAwt/SvgElementMapper.java [49:81]:
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    super.registerSynchronizers(conf);

    conf.add(new Synchronizer() {
      private Registration myReg;

      @Override
      public void attach(SynchronizerContext ctx) {
        myReg = getSource().addListener(new SvgElementListener<Object>() {
          @Override
          public void onAttrSet(SvgAttributeEvent<Object> event) {
            if (event.getNewValue() == null) {
              getTarget().removeAttribute(event.getAttrSpec().toString());
            }
            getTarget().setAttribute(event.getAttrSpec().toString(), event.getNewValue().toString());
          }
        });

        for (SvgAttributeSpec<?> key : getSource().getAttributeKeys()) {
          getTarget().setAttribute(key.toString(), getSource().getAttribute(key.getName()).get().toString());
        }
      }

      @Override
      public void detach() {
        myReg.remove();
      }
    });

    conf.add(Synchronizers.forPropsOneWay(getSource().handlersSet(), new WritableProperty<Set<SvgEventSpec>>() {
      @Override
      public void set(Set<SvgEventSpec> value) {
        if (myHandlerRegs == null) {
          myHandlerRegs = new EnumMap<>(SvgEventSpec.class);
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svg/src/main/java/jetbrains/jetpad/projectional/svg/toDom/SvgElementMapper.java [51:83]:
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    super.registerSynchronizers(conf);

    conf.add(new Synchronizer() {
      private Registration myReg;

      @Override
      public void attach(SynchronizerContext ctx) {
        myReg = getSource().addListener(new SvgElementListener<Object>() {
          @Override
          public void onAttrSet(SvgAttributeEvent<Object> event) {
            if (event.getNewValue() == null) {
              getTarget().removeAttribute(event.getAttrSpec().toString());
            }
            getTarget().setAttribute(event.getAttrSpec().toString(), event.getNewValue().toString());
          }
        });

        for (SvgAttributeSpec<?> key : getSource().getAttributeKeys()) {
          getTarget().setAttribute(key.toString(), getSource().getAttribute(key.getName()).get().toString());
        }
      }

      @Override
      public void detach() {
        myReg.remove();
      }
    });

    conf.add(Synchronizers.forPropsOneWay(getSource().handlersSet(), new WritableProperty<Set<SvgEventSpec>>() {
      @Override
      public void set(Set<SvgEventSpec> value) {
        if (myHandlerRegs == null) {
          myHandlerRegs = new EnumMap<>(SvgEventSpec.class);
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