parameters: (func_ir, var)
return_statement: return var_def.items, var_def.op
docstring: Check if a variable is constructed via build_tuple or
      build_list or build_set, and return the sequence and the
      operator, or raise GuardException otherwise.
      Note: only build_tuple is immutable, so use with care.
docstring_summary: Check if a variable is constructed via build_tuple or
      build_list or build_set, and return the sequence and the
      operator, or raise GuardException otherwise.
      Note: only build_tuple is immutable, so use with care.
docstring_tokens: Check if a variable is constructed via build_tuple or build_list or build_set and return the sequence and the operator or raise GuardException otherwise . Note : only build_tuple is immutable so use with care .
function: def find_build_sequence(func_ir, var):
      """Check if a variable is constructed via build_tuple or
      build_list or build_set, and return the sequence and the
      operator, or raise GuardException otherwise.
      Note: only build_tuple is immutable, so use with care.
      """
      require(isinstance(var, ir.Var))
      var_def = get_definition(func_ir, var)
      require(isinstance(var_def, ir.Expr))
      build_ops = ['build_tuple', 'build_list', 'build_set']
      require(var_def.op in build_ops)
      return var_def.items, var_def.op
function_tokens: def find_build_sequence ( func_ir , var ) : require ( isinstance ( var , ir . Var ) ) var_def = get_definition ( func_ir , var ) require ( isinstance ( var_def , ir . Expr ) ) build_ops = [ 'build_tuple' , 'build_list' , 'build_set' ] require ( var_def . op in build_ops ) return var_def . items , var_def . op