Membrane.Pipeline.start

You're seeing just the function start, go back to Membrane.Pipeline module for more information.

start(module, pipeline_options \\ nil, process_options \\ [])

start(
  module(),
  pipeline_options :: pipeline_options_t(),
  process_options :: GenServer.options()
) :: GenServer.on_start()

Does the same as start_link/3 but starts process outside of supervision tree.