docstr: Vertices dtype
docstr_tok: ["Vertices","dtype"]
code: def vtype(self):
      """Vertices dtype"""
      return self._vtype
  
imports: from __future__ import division
  import math
  import numpy
  from ...gloo import Texture2D, VertexBuffer, IndexBuffer
  from .util import dtype_reduce
  from .array_list import ArrayList
label_desc: Use image node_id 3 for calling the BaseCollection obj's underlying member method code with example usage: obj.vtype() and returns: self