fn is_hook_call_on<'hir>(
gcx: Gcx<'hir>,
hir: &'hir Hir<'hir>,
expr: &'hir Expr<'hir>,
recipient: VariableId,
token: VariableId,
) -> boolExpand description
recipient.onERC721Received(..., token, ...): the hook, asked of the recipient itself and
about the delegated token itself. A recipient may accept one token and refuse another, so an
answer about a different id, the hook’s third parameter, decides nothing for the minted one.