code: def build_index(path):
      """Builds a tabix index for VCF at the specified path."""
      tabix_indexer.tbx_index_build(path)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from third_party.nucleus.io.python import tabix_indexer
label_desc: Use image node_id 1 for calling a global function with example usage: build_index(path) without return types