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: graph.rs
    path of file: ./repos/readyset/readyset-mir/src
    
    the code of the file until where you have to start completion: //! The MIR Graph module
//!
//! This module provides the structures to store the MIR graph state, primarily through the
//! [`MirGraph`] struct.
//! The graph representation allow us to centralize all the different MIR query graphs into
//! a single graph, with each query now being a subgraph of it.
use std::iter;
use std::ops::{Deref, DerefMut, Index, IndexMut};

use itertools::Itertools;
u
    
    pub(crate) fn provides_column(&self, node: NodeIndex, column: &MirColumn) -> bool {
        if let MirNodeInner::AliasTable { table } = &self.graph[node].inner {
            // Can't project a column through an alias_table node unless the column has the aliased
            // table in one of its aliases
            if !column.has_table(table) {
                return false;
            }
        }

        self.columns(node).contains(column)
            || self
                .graph
                .neighbors_directed(node, Direction::Incoming)
                .any(|a| self.provides_column(a, column))
    }