code: def assemble(self):
      return self.assembler.assemble()
  
imports: import json
  import math
  import numpy
  from m2cgen import ast
  from m2cgen.assemblers import utils
  from m2cgen.assemblers.base import ModelAssembler
  from m2cgen.assemblers.linear import _linear_to_ast
label_desc: Use image node_id 2 for calling the XGBoostModelAssemblerSelector obj's underlying member method code with example usage: obj.assemble() and returns: self