class_docstr: Vertical span annotation at the given position.
class_docstr_tok: ["Vertical","span","annotation","at","the","given","position","."]
code: def __init__(self, x1=None, x2=None, **params):
      super().__init__([x1, x2], x1=x1, x2=x2, **params)
  
imports: from numbers import Number
  import numpy
  import param
  from ..core import Dimension, Element, Element2D
  from ..core.data import Dataset
  from ..core.util import datetime_types
label_desc: Use image node_id 1 to create a new VSpan object from inherited base classes: Annotation with example: obj = VSpan(x1, x2)