code: def masked_scalar_null_op_impl(context, builder, sig, args):
      """
      Implement `MaskedType` <op> `NAType`
      or `NAType` <op> `MaskedType`
      The answer to this is known up front so no actual operation
      needs to take place
      """
  
      return_type = sig.return_type  # MaskedType(...)
      result = cgutils.create_struct_proxy(
          MaskedType(return_type.value_type)
      )(context, builder)
  
      # Invalidate the struct and leave `value` uninitialized
      result.valid = context.get_constant(types.boolean, 0)
      return result._getvalue()
  
imports: import operator
  from llvmlite import ir
  from numba.core import cgutils
  from numba.core.typing import signature
  from numba.cuda.cudaimpl import lower, registry
  from numba.extending import lower_builtin, types
  from cudf.core.udf import api
  from cudf.core.udf._ops import arith_ops, bitwise_ops, comparison_ops, unary_ops
  from cudf.core.udf.masked_typing import MaskedType, NAType, _supported_masked_types
label_desc: Use image node_id 6 for calling a global function with example usage: masked_scalar_null_op_impl(context, builder, sig, args) and returns: result