code: def dtype_is_supported(dtype):
      """Check if data type is supported by BNNS backend"""
      return dtype in ("", "float32")
  
imports: import math
  import tvm.ir
  from tvm.relay import transform
  from tvm.relay.expr import const
  from tvm.relay.build_module import bind_params_by_name
  from .register import register_pattern_table, get_pattern_table
  from ...dataflow_pattern import wildcard, is_op, is_expr
label_desc: Use image node_id 7 for calling a global function with example usage: dtype_is_supported(dtype) and returns: unknown