let dup: array('a) => array('a);let sub: array('a) => int => int => array('a);let concat: list(array('a)) => array('a);let make: int => 'a => array('a);let make_float: int => array(float);let blit: array('a) => int => array('a) => int => int => unit;let get: array('a) => int => 'a;let set: array('a) => int => 'a => unit;