How did heqet and Ranofer plan for Ranofer to continue learning the goldsmith trade even though he now works at the stonecutter's shop?

Heqet arranged for Ranofer to secretly study goldsmithing at the house of Ibni, a skilled goldsmith. Ranofer would go to Ibni's house in the evenings after working at the stonecutter's shop. This way, Ranofer could continue learning the goldsmith trade without Master Gebu knowing.