docstr: Check if the time series have more than two data points.
docstr_tok: ["Check","if","the","time","series","have","more","than","two","data","points","."]
code: def _sanity_check(self):
      """
      Check if the time series have more than two data points.
      """
      if len(self.time_series_a) < 2 or len(self.time_series_b) < 2:
          raise exceptions.NotEnoughDataPoints(
              "luminol.Correlator: Too few data points!"
          )
  
file_path: luminol/src/luminol/correlator.py
imports: from luminol import exceptions, utils
  from luminol.algorithms.correlator_algorithms.all import correlator_algorithms
  from luminol.anomaly_detector import AnomalyDetector
  from luminol.constants import CORRELATOR_ALGORITHM
  from luminol.modules.time_series import TimeSeries
label_desc: Use image node_id 5 for calling the Correlator obj's underlying member method code with example usage: obj._sanity_check() without return types