docstr: Return keys from structured data
docstr_tok: ["Return","keys","from","structured","data"]
code: def keys(self):
      """Return keys from structured data"""
      return list(self.template_dtype.names)
  
imports: from __future__ import annotations
  import numpy
  from .None import imageglobals
  from .batteryrunners import BatteryRunner
  from .volumeutils import Recoder, endian_codes, native_code, pretty_mapping, swapped_code
label_desc: Use image node_id 12 for calling the WrapStruct obj's underlying member method code with example usage: obj.keys() and returns: list