Function parse_state

pub async fn parse_state(
    stats: &mut SystemdUnitStats,
    unit: &(String, String, String, String, String, String, OwnedObjectPath, u32, String, OwnedObjectPath),
    allowlist: &[String],
    blocklist: &[String],
    connection: Option<&Connection>,
) -> Result<()>

Parse state of a unit into our unit_states hash