code: public void setIconAllowOverlap( Boolean value) {
      PropertyValue propertyValue = iconAllowOverlap(value);
      constantPropertyUsageMap.put(PROPERTY_ICON_ALLOW_OVERLAP, propertyValue);
      layer.setProperties(propertyValue);
    }
docs: Set the IconAllowOverlap property
  <p>
  If true, the icon will be visible even if it collides with other previously drawn symbols.
  </p>
  
  @param value property wrapper value around Boolean