Function to flush a page.

Function to flush all pages.

Function to get an existing page and pull; errors if requesting a page that has not been allocated.

Function to allocate a new page.

Function to pin a page.

Function to print out state of the pager.

Function to print out the contents of a page.

Function to unpin a page.

Function to write data to a page.

Construct a new Pager.

Creates a Pager REPL for testing the Pager with.

pagenum for when there is no page being held.

Number of pages.

Page size - defaults to 4kb.

A page is a unit that is read from and written to disk.

Pagers manage pages of data read from a file.