Jitsi meet torture documentation

Hi, do you know where i can find documentation or source code related to jitsi meet torture specific parameters

e.g:

public static final String USE_NODE_TYPES_PNAME
= “org.jitsi.malleus.use_node_types”;
public static final String MAX_DISRUPTED_BRIDGES_PCT_PNAME
= “org.jitsi.malleus.max_disrupted_bridges_pct”;
public static final String USE_LOAD_TEST_PNAME
= “org.jitsi.malleus.use_load_test”;
public static final String SWITCH_SPEAKERS
= “org.jitsi.malleus.switch_speakers”;
public static final String USE_STAGE_VIEW
= “org.jitsi.malleus.use_stage_view”;

Where can i read the source code for these packages ?

Another question:
If server is configured with audio/video muted at start , how can we activate microphone for participant from Malleus FourPeople_1280x720_30.y4m (It works on public server). Tried to pass config but it doesnt override server parameters . Should we try to do it programmaticaly ?

thank you.