55     fn index(&self, index: u32) -> &Self::Output {  in index()  method
56         let start = index * self.elem_size;  in index()
62     fn index_mut(&mut self, index: u32) -> &mut Self::Output {  in index_mut()
63         let start = index * self.elem_size;  in index_mut()
87         let index = u32::from_ne_bytes(key.try_into().map_err(|_| SystemError::EINVAL)?);  in lookup_elem()  localVariable
88         if index >= self.max_entries {  in lookup_elem()
91         let val = self.data.index(index);  in lookup_elem()
98         let index = u32::from_ne_bytes(key.try_into().map_err(|_| SystemError::EINVAL)?);  in update_elem()  localVariable
99         if index >= self.max_entries {  in update_elem()
105         let old_value = self.data.index_mut(index);  in update_elem()
120             let value = self.data.index(i);  in for_each_elem()
140             let index = u32::from_ne_bytes(key.try_into().map_err(|_| SystemError::EINVAL)?);  in get_next_key()  localVariable
141             if index == self.max_entries - 1 {  in get_next_key()
144             let next_index = index + 1;  in get_next_key()
248         let value = self.fds.index(cpu_id);  in lookup_elem()
268             let value = self.fds.index(i);  in for_each_elem()