code: def highlight_number(x):
      """Themes numbers in a summary using rich markup.
  
      We use a separate color for `None`s, e.g. in a layer shape.
      """
      if x is None:
          return f"[color(45)]{x}[/]"
      else:
          return f"[color(34)]{x}[/]"
  
file_path: keras/keras/utils/summary_utils.py
imports: import math
  import re
  import shutil
  import rich
  import rich.console
  import rich.markup
  import rich.table
  import tree
  from keras import backend
  from keras.utils import dtype_utils
  from keras.utils import io_utils
label_desc: Use image node_id 4 for calling a global function with example usage: highlight_number(x) and returns: str, x, str, str, x, str