— function: additional-representation-by-string imol atom_selection representation_type bonds_box_type bond_width draw_hydrogens_flag

Where:

• imol is an integer number
• atom_selection is a string
• representation_type is an integer number
• bonds_box_type is an integer number
• bond_width is a number
• draw_hydrogens_flag is an integer number

return the index of the additional representation. Return -1 on error