code: def fromXML(self, name, attrs, content, ttFont):
      assert name == "NamedInstance"
      self.subfamilyNameID = safeEval(attrs["subfamilyNameID"])
      self.flags = safeEval(attrs.get("flags", "0"))
      if "postscriptNameID" in attrs:
          self.postscriptNameID = safeEval(attrs["postscriptNameID"])
      else:
          self.postscriptNameID = 0xFFFF
  
      for tag, elementAttrs, _ in filter(
          lambda t: type(t) is tuple, content
      ):
          if tag == "coord":
              value = str2fl(elementAttrs["value"], 16)
              self.coordinates[elementAttrs["axis"]] = value
  
imports: from fontTools.misc import sstruct
  from fontTools.misc.fixedTools import fixedToFloat, floatToFixed, floatToFixedToStr, strToFixedToFloat
  from fontTools.misc.textTools import Tag, bytesjoin, safeEval
  from fontTools.ttLib import TTLibError
  from .None import DefaultTable
  import struct
label_desc: Use image node_id 5 for calling the NamedInstance obj's underlying member method code with example usage: obj.fromXML(name, attrs, content, ttFont) without return types