def add_set(self, sketch, xs):
    """Add a set of elements to the sketch.

    Args:
      sketch: sketch to add xs to
      xs: a set of name or id in string
    """
    assert self.depth, self.width == sketch.shape
    for x in xs:
      x = str(x)
      if not self.contain(sketch, x):
        self.add(sketch, x)
Add a set of elements to the sketch.

    Args:
      sketch: sketch to add xs to
      xs: a set of name or id in string
    
language/emql/cm_sketch.py