# File lib/brakeman/processors/lib/call_conversion_helper.rb, line 10
    def join_arrays lhs, rhs, original_exp = nil
      if array? lhs and array? rhs
        result = Sexp.new(:array)
        result.line(lhs.line || rhs.line)
        result.concat lhs[1..-1]
        result.concat rhs[1..-1]
        result
      else
        original_exp
      end
    end