code: def plot_single(self, col, ax):
      sns.histplot(self._dataset[col], ax=ax, kde=False, bins=100)
      ax.set_xlabel("")
      ax.set_title(col)
  
imports: import pandas
  import numpy
  from qlib.contrib.report.data.base import FeaAnalyser
  from qlib.contrib.report.utils import sub_fig_generator
  from qlib.utils.paral import datetime_groupby_apply
  from qlib.contrib.eva.alpha import pred_autocorr_all
  from loguru import logger
  import seaborn
label_desc: Use image node_id 1 for calling the FeaDistAna obj's underlying member method code with example usage: obj.plot_single(col, ax) without return types