testmodels/src/main/java/com/amplifyframework/testmodels/noteswithauth/PrivateNote.java [111:152]:
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          id,
          content);
    }
    
    @Override
     public BuildStep content(String content) {
        Objects.requireNonNull(content);
        this.content = content;
        return this;
    }
    
    /** 
     * WARNING: Do not set ID when creating a new object. Leave this blank and one will be auto generated for you.
     * This should only be set when referring to an already existing object.
     * @param id id
     * @return Current Builder instance, for fluent method chaining
     * @throws IllegalArgumentException Checks that ID is in the proper format
     **/
    public BuildStep id(String id) throws IllegalArgumentException {
        this.id = id;
        
        try {
            UUID.fromString(id); // Check that ID is in the UUID format - if not an exception is thrown
        } catch (Exception exception) {
          throw new IllegalArgumentException("Model IDs must be unique in the format of UUID.",
                    exception);
        }
        
        return this;
    }
  }
  

  public final class CopyOfBuilder extends Builder {
    private CopyOfBuilder(String id, String content) {
      super.id(id);
      super.content(content);
    }
    
    @Override
     public CopyOfBuilder content(String content) {
      return (CopyOfBuilder) super.content(content);
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testmodels/src/main/java/com/amplifyframework/testmodels/noteswithauth/PublicNote.java [111:152]:
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          id,
          content);
    }
    
    @Override
     public BuildStep content(String content) {
        Objects.requireNonNull(content);
        this.content = content;
        return this;
    }
    
    /** 
     * WARNING: Do not set ID when creating a new object. Leave this blank and one will be auto generated for you.
     * This should only be set when referring to an already existing object.
     * @param id id
     * @return Current Builder instance, for fluent method chaining
     * @throws IllegalArgumentException Checks that ID is in the proper format
     **/
    public BuildStep id(String id) throws IllegalArgumentException {
        this.id = id;
        
        try {
            UUID.fromString(id); // Check that ID is in the UUID format - if not an exception is thrown
        } catch (Exception exception) {
          throw new IllegalArgumentException("Model IDs must be unique in the format of UUID.",
                    exception);
        }
        
        return this;
    }
  }
  

  public final class CopyOfBuilder extends Builder {
    private CopyOfBuilder(String id, String content) {
      super.id(id);
      super.content(content);
    }
    
    @Override
     public CopyOfBuilder content(String content) {
      return (CopyOfBuilder) super.content(content);
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