code: def _get_chart(self, chart_type, x=None, y=None, style=None, opts=None,
  				   label=None, options={}, **kwargs):
  		
  		sbcharts = ["density", "distribution", "dlinear"]
  		acharts = ["tick", "circle", "text", "line_num", "bar_num"]
  		if chart_type in sbcharts:
  			self._set_seaborn_engine()
  		if chart_type in acharts:
  			self._set_altair_engine()
  		if chart_type != "sline":
  			x, y = self._check_fields(x, y)
  		if opts is None:
  			opts = self.chart_opts
  		if style is None:
  			style = self.chart_style
  		if self.engine == "bokeh":
  			func = self._get_bokeh_chart
  		elif self.engine == "altair":
  			func = self._get_altair_chart
  		elif self.engine == "chartjs":
  			func = self._get_chartjs_chart
  		elif self.engine == "seaborn":
  			func = self._get_seaborn_chart
  		else:
  			self.err("Engine " + self.engine + " unknown")
  			return
  		try:
  			chart = func(
  				x, y, chart_type, label, opts, style,
  				options=options, **kwargs)
  			return chart
  		except Exception as e:
  			self.err(e)
docs: Get a full chart object