code: def _empty_array(size, dtype=np.float32):
      return np.empty((size, 0), dtype=dtype)
  
imports: import networkx
  import numpy
  import pandas
  import pytest
  from stellargraph.core.convert import ColumnarConverter, convert_nodes, convert_edges, from_networkx
  from stellargraph.core.indexed_array import IndexedArray
label_desc: Use image node_id 1 for calling a global function with example usage: _empty_array(size, dtype) and returns: np