code: def get_most_frequent(x):
      a = x.value_counts()
      first = sorted(dict(a).items(), key=lambda x: -x[1])[0]
      return first[0]
  
imports: import numpy
  import pandas
  from scipy import stats
  from sklearn import preprocessing
label_desc: Use image node_id 10 for calling the PreprocessingUtils obj's underlying member method code with example usage: obj.get_most_frequent(x) and returns: first