anchor.diff:  First we make minor adjustments to the Person model:
   
   ---------------------------------------------------------------------------------------------------------------------------------------------------------------
  +package com.example;
  +import static com.example.PersonTable.TABLE;
  +import static com.example.PersonTable.ID;
  +import static com.example.PersonTable.GENDER;
  +import static com.example.PersonTable.AGE;
  +import static com.example.PersonTable.LAST_NAME;
  +import static com.example.PersonTable.FIRST_NAME;
  +
  +// ...
  +
   public class Person {
   
       public static enum Gender {
  
positive.code: -----------------------------------------------------------------------------------------------------------------
  public class PersonTable {
  
      public static final PKColumnDef<PersonId>    ID         = new PKColumnDef<PKColumnDef>("id", PersonId.class, "person_seq");
      public static final ColumnDef<String> FIRST_NAME = ColumnDefs.varchar("first_name");
      public static final ColumnDef<String> LAST_NAME  = ColumnDefs.varchar("last_name");
      public static final ColumnDef<Integer> AGE       = ColumnDefs.integer("age");
      public static final ColumnDef<Gender> GENDER     = ColumnDefs.enum("gender", Gender.class);
  
      public static final TableDef TABLE = new TableDef("person", FIRST_NAME, LAST_NAME, AGE, GENDER);
  
  }
  -----------------------------------------------------------------------------------------------------------------
  
negative.code: -----------------------------------------------------------------------------------------------------------------
  public class PersonTable {
  
      static final ColumnDef<Long>   ID         = ColumnDefs.long("id");
      static final ColumnDef<String> FIRST_NAME = ColumnDefs.varchar("first_name");
      static final ColumnDef<String> LAST_NAME  = ColumnDefs.varchar("last_name");
      static final ColumnDef<Integer> AGE       = ColumnDefs.integer("age");
      static final ColumnDef<Gender> GENDER     = ColumnDefs.enum("gender", Gender.class);
  
      static final TableDef TABLE = new TableDef("person", FIRST_NAME, LAST_NAME, AGE, GENDER);
  
  }
  -----------------------------------------------------------------------------------------------------------------
  