You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: debug_info.rs
    path of file: ./repos/differential-datalog/rust/template/ddlog_profiler/src
    
    the code of the file until where you have to start completion: use crate::source_code::SourcePosition;
use crate::Profile;
use std::{borrow::Cow, fmt::Display, slice};

const SHORT_DESCR_LEN: u32 = 96;

/// Different types of operators used to encode DDlog programs to a
/// Differential Dataflow graph.  These are closely tied to the encoding
/// used by the DDlog compiler.
///
/// We use the following naming conventions for `Opera
    
    pub fn source_pos(&self) -> &[SourcePosition] {
        match self {
            Self::Dataflow => &[],
            Self::Builtin { .. } => &[],
            Self::Input { source_pos, .. } => slice::from_ref(source_pos),
            Self::Filter { source_pos } => slice::from_ref(source_pos),
            Self::FilterMap { source_pos } => slice::from_ref(source_pos),
            Self::Head { source_pos } => slice::from_ref(source_pos),
            Self::Flatmap { source_pos } => slice::from_ref(source_pos),
            Self::Map { source_pos } => slice::from_ref(source_pos),
            Self::FixedPoint { source_pos, .. } => slice::from_ref(source_pos),
            Self::RecursiveComponent { .. } => &[],
            Self::StreamXForm { source_pos } => slice::from_ref(source_pos),
            Self::JoinWithEnabled { used_at, .. } => used_at,
            Self::ConsolidateOutput { source_pos, .. } => slice::from_ref(source_pos),
            Self::DelayedRelation { used_at, .. } => used_at,
            Self::InspectOutput { source_pos, .. } => slice::from_ref(source_pos),
            Self::ProbeIndex { used_at, .. } => used_at,
            Self::ProbeOutput { source_pos, .. } => slice::from_ref(source_pos),
            Self::ConcatenateRelation { source_pos, .. } => slice::from_ref(source_pos),
            Self::DistinctRelation { source_pos, .. } => slice::from_ref(source_pos),
            Self::ArrangeRelationNonRec { used_at, .. } => used_at,
            Self::ArrangeRelationRecInner { used_at, .. } => used_at,
            Self::ArrangeRelationRecOuter { used_at, .. } => used_at,
            Self::Inspect { source_pos } => slice::from_ref(source_pos),
            Self::Arrange { source_pos, .. } => slice::from_ref(source_pos),
            Self::StreamArrange { source_pos, .. } => slice::from_ref(source_pos),
            Self::Join { source_pos, .. } => slice::from_ref(source_pos),
            Self::Semijoin { source_pos, .. } => slice::from_ref(source_pos),
            Self::Antijoin { source_pos, .. } => slice::from_ref(source_pos),
            Self::ArrStreamJoin { source_pos, .. } => slice::from_ref(source_pos),
            Self::ArrStreamSemijoin { source_pos, .. } => slice::from_ref(source_pos),
            Self::StreamArrJoin { source_pos, .. } => slice::from_ref(source_pos),
            Self::StreamArrSemijoin { source_pos, .. } => slice::from_ref(source_pos),
            Self::GroupBy { source_pos } => slice::from_ref(source_pos),
            Self::Differentiate { source_pos, .. } => slice::from_ref(source_pos),
            Self::ApplyTransformer { source_pos, .. } => slice::from_ref(source_pos),
            Self::RelEnterRecursiveScope { .. } => &[],
            Self::ArrEnterRecursiveScope { .. } => &[],
            Self::RelLeaveRecursiveScope { .. } => &[],
        }
    }