code: def assemble(self):
      return self._build_ast()
  
imports: import math
  import numpy
  from m2cgen import ast
  from m2cgen.assemblers import utils
  from m2cgen.assemblers.base import ModelAssembler
label_desc: Use image node_id 1 for calling the BaseLinearModelAssembler obj's underlying member method code with example usage: obj.assemble() and returns: self