src/main/java/me/zzp/ar/Table.java
private Association assoc(String name, boolean onlyOne, boolean ancestor) {
    name = DB.parseKeyParameter(name);
    Association assoc = new Association(relations, name, onlyOne, ancestor);
    relations.put(name, assoc);
    return assoc;
  }
private Association assoc(String name, boolean onlyOne, boolean ancestor) {
    name = DB.parseKeyParameter(name);
    Association assoc = new Association(relations, name, onlyOne, ancestor);
    relations.put(name, assoc);
    return assoc;
  }
/* Association