S3 dispatch on class of pipe_right_argument. For formal documentation please see https://github.com/WinVector/wrapr/blob/master/extras/wrapr_pipe.pdf.
wrapr_function(pipe_left_arg, pipe_right_arg, pipe_environment,
pipe_name = NULL)
left argument.
right argument (general object, not a function).
environment to evaluate in.
character, name of pipe operator.
result