205     fn read_header_at(&mut self, header_offset: u64) -> Result<PartitionHeader> {  in read_header_at()
207             header_offset % PARTITION_HEADER_SIZE == 0,  in read_header_at()
209             header_offset  in read_header_at()
213         self.file.seek(SeekFrom::Start(header_offset))?;  in read_header_at()
224         header_offset: u64,  in write_header_at()
228         self.file.seek(SeekFrom::Start(header_offset))?;  in write_header_at()
242         let mut header_offset = DISK_HEADER_SIZE;  in locate_microdroid_header()  localVariable
244             let header = self.read_header_at(header_offset)?;  in locate_microdroid_header()
247                 return Ok((Some(header), header_offset));  in locate_microdroid_header()
250                 return Ok((None, header_offset));  in locate_microdroid_header()
257             header_offset = header_offset  in locate_microdroid_header()