Survey of functions returning `bool` under most remaining workspaces

Survey of functions returning bool under all workspaces but gstreamer & gstreamer-base (already processed: see #171 (closed) & #175 (closed)) and gstreamer-editing-services & gstreamer-sdp (will come in speratate issues because many functions are concerned).

Workspace gstreamer-app

Function	Location	Gst Function	Proposed Return Type	Comment
AppSrc.seek_data	src	GstAppSrcCallbacks.seek_data	keep bool	Returns TRUE if the seek succeeded. Note: Seek function -> bool
AppSrc.connect_seek_data	auto	GstAppSrcCallbacks.seek_data	same as above
AppSrcCallbacks.seek_data	src	GstAppSrcCallbacks.seek_data	same as above
AppSrcCallbacksBuilder.seek_data	src	GstAppSrcCallbacks.seek_data	same as above

Workspace gstreamer-audio

Function	Location	Gst Function	Proposed Return Type	Comment
AudioChannelPosition.check_valid_channel_positions	auto	gst_audio_check_valid_channel_positions	keep bool	Returns TRUE if the channel positions are valid.

Workspace gstreamer-check

Function	Location	Gst Function	Proposed Return Type	Comment
Harness.push_event	src	gst_harness_push_event	keep bool	Event function -> bool
Harness.push_upstream_event	src	gst_harness_push_upstream_event	keep bool	Event function -> bool
Harness.src_push_event	src	gst_harness_src_push_event	keep bool	Event function -> bool
TestClock.crank	auto	gst_test_clock_crank	Result<(), glib::BoolError>	Return: TRUE if the crank was successful, FALSE otherwise.

Workspace gstreamer-editing-services

Many. Will be included in a dedicated issue.

Workspace gstreamer-gl

Function	Location	Gst Function	Proposed Return Type	Comment
GlColorConvert.set_caps	auto	gst_gl_color_convert_set_caps	Result<(), glib::BoolError>
GlContext.check_feature	auto	gst_gl_context_check_feature	keep bool	Returns whether feature is supported by context
GlContext.check_framebuffer_status	auto	gst_gl_context_check_framebuffer_status	keep bool	Returns whether the current framebuffer is complete
GlContext.check_gl_version	auto	gst_gl_context_check_gl_version	keep bool	Returns whether OpenGL context implements the required api and specified version.
GlContext.set_window	auto	gst_gl_context_set_window	Result<(), glib::BoolError>	Returns whether the window was successfully updated
GlContext.supports_glsl_profile_version	auto	gst_gl_context_supports_glsl_profile_version	keep bool	Returns whether context supports the combination of version with profile
GlShader.attach	auto	gst_gl_shader_attach	Result<(), glib::BoolError>	Returns whether stage could be attached to shader
GlShader.attach_unlocked	auto	gst_gl_shader_attach_unlocked	Result<(), glib::BoolError>	Returns whether stage could be attached to shader
GlUpload.set_caps	auto	gst_gl_upload_set_caps	Result<(), glib::BoolError>	Returns whether in_caps and out_caps could be set on upload
GlViewConvert.set_caps	auto	gst_gl_view_convert_set_caps	Result<(), glib::BoolError>	Result not described in doc
GlWindow.set_render_rectangle	auto	gst_gl_window_set_render_rectangle	Result<(), glib::BoolError>	Returns whether the specified region could be set
GlslStage.set_strings	auto	gst_glsl_stage_set_strings	Result<(), glib::BoolError>	Result not described in doc

Workspace gstreamer-net

All filtered out.

Workspace gstreamer-pbutils

All filtered out.

Workspace gstreamer-player

All filtered out.

Workspace gstreamer-rtsp

None

Workspace gstreamer-rtsp-server

Function	Location	Gst Function	Proposed Return Type	Comment
RtspAuth.check	auto	gst_rtsp_auth_check	Result<(), glib::BoolError>	Returns FALSE if check failed.
RtspAuth.connect_accept_certificate	auto	"accept-certificate" signal	Result<(), glib::LoggableError>	Returns TRUE to accept peer_cert (which will also immediately end the signal emission). FALSE to allow the signal emission to continue, which will cause the handshake to fail if no one else overrides it.
RtspServer.io_func	auto	gst_rtsp_server_io_func	Result<(), glib::BoolError>	Returns TRUE if the source could be connected, FALSE if an error occurred.
RtspServer.transfer_connection	auto	gst_rtsp_server_transfer_connection	Result<(), glib::BoolError>	Returns TRUE if all was ok, FALSE if an error occurred.
RtspSession.release_media	auto	gst_rtsp_session_release_media	keep bool	Returns TRUE if there are more media session left in sess.
RtspStream.set_blocked	auto	gst_rtsp_stream_set_blocked	Result<(), glib::BoolError>	Returns TRUE on success
RtspStream.unblock_linked	auto	gst_rtsp_stream_unblock_linked	Result<(), glib::BoolError>	Returns TRUE on success
RtspStream.update_crypto	auto	gst_rtsp_stream_update_crypto	Result<(), glib::BoolError>	Returns: TRUE if crypto could be updated

Workspace gstreamer-sdp

Many. Will be included in a dedicated issue.

Workspace gstreamer-video

All filtered out.

Workspace gstreamer-webrtc

All filtered out.