ETreeModelGenerator @model: @child_iter: @data: @Returns: @model: @child_iter: @permutation_n: @column: @value: @data: @child_model: @Returns: @tree_model_generator: @Returns: @tree_model_generator: @func: @data: @destroy: @tree_model_generator: @func: @data: @destroy: @tree_model_generator: @child_path: @Returns: @tree_model_generator: @generator_iter: @child_iter: @tree_model_generator: @generator_path: @Returns: @tree_model_generator: @child_iter: @permutation_n: @generator_iter: