code: def param_names(self):
      return ["intercept", "var.e", "var.x.coeff", "var.w.coeff"]
  
imports: from collections import OrderedDict
  import matplotlib.pyplot
  import numpy
  import pandas
  import statsmodels.api
  import pymc3
  import theano
  import theano.tensor
label_desc: Use image node_id 2 for calling the TVRegression obj's underlying member method code with example usage: obj.param_names() and returns: list