Hashes the image stored under id the way createHeapRoot did when it was written, one chunk row at a time and without inflating, or undefined when there is no such snapshot row.
id
when a chunk's bytes column is not a blob (the writer binds a blob, so anything else was written by somebody else)
Hashes the image stored under
idthe way createHeapRoot did when it was written, one chunk row at a time and without inflating, or undefined when there is no such snapshot row.