This class enables you to interact with Feather files. Create
one to connect to a file or other InputStream, and call Read() on it to
make an arrow::Table. See its usage in read_feather().
The FeatherReader$create() factory method instantiates the object and
takes the following arguments:
file an Arrow file connection object inheriting from RandomAccessFile.
mmap Logical: whether to memory-map the file (default TRUE)
... Additional arguments, currently ignored
$Read(columns): Returns a Table of the selected columns, a vector of
integer indices
$version: Active binding, returns 1 or 2, according to the Feather
file version