Eco

the module hasn’t doc yet.

• insert_buffer

• create_net

• create_cell

• create_port

• connect_net

• remove_buffer

• connect_pin

• size_cell

• disconnect_net

• remove_net

• current_design_name

• current_instance

• create_design

• remove_design

• remove_port

• remove_bus

• create_bus

• remove_cell

• all_connected