logback-android/src/main/java/ch/qos/logback/core/pattern/parser/Parser.java
Node E() throws ScanException {
    Node t = T();
    if (t == null) {
      return null;
    }
    Node eOpt = Eopt();
    if (eOpt != null) {
      t.setNext(eOpt);
    }
    return t;
  }
Node E() throws ScanException {
    Node t = T();
    if (t == null) {
      return null;
    }
    Node eOpt = Eopt();
    if (eOpt != null) {
      t.setNext(eOpt);
    }
    return t;
  }
E = TEopt