This directory contains common placeholder FIDL protocols and implementations that can be used in tests:

• placeholders.test.fidl: FIDL library containing a simple Echo FIDL protocol definition.
• echo_realm_placeholder: A realm containing echo client and server components:
  • echo_client: A child component that is eagerly started with the realm. Connects to the echo_server over the test.placeholders.Echo protocol.
  • echo_server: Implements and serves the test.placeholders.Echo protocol.