code: @Override
      public String getTypeDefinition(String typeName) throws AtlasException {
          final IDataType dataType = typeSystem.getDataType(IDataType.class, typeName);
          return TypesSerialization.toJson(typeSystem, dataType.getName());
      }
docs: Return the definition for the given type.
  
  @param typeName name for this type, must be unique
  @return type definition as JSON