code: def ggtitle(label, subtitle=None):
      """
      Add title to the plot.
  
      Parameters
      ----------
      label : str
          The text for the plot title.
      subtitle : str
          The text for the plot subtitle.
  
      Returns
      -------
      `FeatureSpec`
          Plot title specification.
  
      Notes
      -----
      Split a long title/subtitle into two lines or more using `\\\\n` as a text separator.
  
      Examples
      --------
      .. jupyter-execute::
          :linenos:
          :emphasize-lines: 5
          
          from lets_plot import *
          LetsPlot.setup_html()
          data = {'x': list(range(10)), 'y': list(range(10))}
          ggplot(data, aes('x', 'y')) + geom_point(aes(size='y')) + \\
              ggtitle('New Plot Title')
  
      """
      return labs(title=label, subtitle=subtitle)
  
imports: from .core import FeatureSpec, FeatureSpecArray
  from .scale import _scale
label_desc: Use image node_id 1 for calling a global function with example usage: ggtitle(label, subtitle) and returns: labs