How does Granny's vision of Hapsy foreshadow the end of the story?
When Granny sees Hapsy, Hapsy "melted from within and turned flimsy as gray gauze and the baby was a gauzy shadow." Granny is dying—her life force is essentially melting away from within. Likewise, she'll be passing into the shadow realm soon, and people who had passed on before her may have felt like they'd been waiting for her forever, like Hapsy says she has been. Granny's "light" will fade at the story's end as Hapsy's does here.