task.deleteVariable(name);
} else if (entity instanceof Token) {
final Token token = (Token) entity;
final ContextInstance contextInstance = token.getProcessInstance().getContextInstance();
oldValue = contextInstance.getVariable(name, token);
contextInstance.deleteVariable(name, token);
} else if (entity instanceof ProcessInstance) {
final ProcessInstance processInstance = (ProcessInstance) entity;
final ContextInstance contextInstance = processInstance.getContextInstance();
oldValue = contextInstance.getVariable(name);
contextInstance.deleteVariable(name);