@Override public Object retrieve(String field) { if (field == null) { return null; } else if (field.equals(ID)) { return getId(); } else if (field.equals(VERSION)) { return getVersion(); } else if (field.equals(ATTENUATION)) { return getAttenuation(); } else if (field.equals(WAVELENGTH)) { return getWavelength(); } else if (field.equals(LIGHTSOURCE)) { return getLightSource(); } else if (field.equals(MICROBEAMMANIPULATION)) { return getMicrobeamManipulation(); } else if (field.equals(DETAILS)) { return getDetails(); } else { if (_dynamicFields != null) { return _dynamicFields.get(field); } return null; } }