A JsonFileFormat is a FileFormat subclass which holds information about how to
read and parse the files included in a JSON Dataset.
A JsonFileFormat object
JsonFileFormat$create() can take options in the form of lists passed through as parse_options,
or read_options parameters.
Available read_options parameters:
use_threads: Whether to use the global CPU thread pool. Default TRUE. If FALSE, JSON input must end with an
empty line.
block_size: Block size we request from the IO layer; also determines size of chunks when use_threads
is TRUE.
Available parse_options parameters:
newlines_in_values:Logical: are values allowed to contain CR (0x0d or \r) and LF (0x0a or \n)
characters? (default FALSE)