// success if union operation was completed successfully, otherwise returns
  // failure.
  //
  // Members can be clustered together:
  //   1. This will not break dominance property of the IR.
  //   2. New clustering policy constraints can be propagated through the
  //      already clustered operations.
  LogicalResult Union(unsigned a, unsigned b,

      return true;
    }
  }
  return false;
}

// Sorts the operations in the provided range to enforce dominance.
// This is useful after fusing / reorganizing Operations in a block and later
// needing to readjust the ordering to ensure dominance.
LogicalResult SortTopologically(Block::iterator begin, Block::iterator end) {
  Block* block = begin->getBlock();

    }
    op->dropAllDefinedValueUses();
    op->dropAllReferences();
    op->erase();
  }
  // Ensure that users of the call op's results appear after the launch op in
  // order to preserve the dominance property.
  TF::ReorderOpResultUses(call_op);
}

}  // namespace common
}  // namespace TFL

	}

	// Match statements that occur after a call to t.Parallel following the final
	// labeled statement in the function body.
	//
	// We iterate over lit.Body.List to have a simple, fast and "frequent enough"
	// dominance relationship for t.Parallel(): lit.Body.List[i] dominates
	// lit.Body.List[j] for i < j unless there is a jump.
	var stmts []ast.Stmt
	afterParallel := false
	for _, stmt := range lit.Body.List {

                } else {
                    return dominant;
                }
            }
        }
        return dominant;
    }

    /**
     * Merge two DOMs, with one having dominance in the case of collision. Merge mechanisms (vs. override for nodes, or
     * vs. append for children) is determined by attributes of the dominant root node.
     *
     * @see #CHILDREN_COMBINATION_MODE_ATTRIBUTE