Create a readable source for the given path/identifier.
Path or identifier for the resource
Optionalprogress: ProgressCallbackOptional callback for progress reporting
Promise resolving to a ReadSource
Get a stored buffer by name.
Name/path of the buffer
The stored data or undefined
Store a named buffer.
Name/path for the buffer
Data to store
ReadFileSystem for reading from named memory buffers. Useful for testing or when data is already in memory.