impl/src/main/java/org/apache/tuscany/sdo/impl/AttributeImpl.java [301:338]:
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  public void unsetName()
  {
    throw new UnsupportedOperationException("Property is frozen and cannot be modified");
  }

  public boolean isSetName()
  {
    return true;
  }
  
  public void unsetOpposite()
  {
    throw new UnsupportedOperationException("Property is frozen and cannot be modified");
  }

  public boolean isSetOpposite()
  {
    return getOpposite() != null;
  }
  
  public void unsetType()
  {
    throw new UnsupportedOperationException("Property is frozen and cannot be modified");
  }

  public boolean isSetType()
  {
    return true;
  }
  
  public void unsetDefault()
  {
    throw new UnsupportedOperationException("Property is frozen and cannot be modified");
  }

  public boolean isSetDefault()
  {
    return getDefault() != null;
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impl/src/main/java/org/apache/tuscany/sdo/impl/ReferenceImpl.java [250:287]:
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  public void unsetName()
  {
    throw new UnsupportedOperationException("Property is frozen and cannot be modified");
  }

  public boolean isSetName()
  {
    return true;
  }
  
  public void unsetOpposite()
  {
    throw new UnsupportedOperationException("Property is frozen and cannot be modified");
  }

  public boolean isSetOpposite()
  {
    return getOpposite() != null;
  }
  
  public void unsetType()
  {
    throw new UnsupportedOperationException("Property is frozen and cannot be modified");
  }

  public boolean isSetType()
  {
    return true;
  }
  
  public void unsetDefault()
  {
    throw new UnsupportedOperationException("Property is frozen and cannot be modified");
  }

  public boolean isSetDefault()
  {
    return getDefault() != null;
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