use graphviz as dot;
use rustc::dep_graph::debug::{DepNodeFilter, EdgeFilter};
use rustc::dep_graph::{DepGraphQuery, DepKind, DepNode};
-use rustc::hir::intravisit::{self, NestedVisitorMap, Visitor};
use rustc::hir::map::Map;
use rustc::ty::TyCtxt;
use rustc_data_structures::fx::FxHashSet;
use rustc_data_structures::graph::implementation::{Direction, NodeIndex, INCOMING, OUTGOING};
use rustc_hir as hir;
use rustc_hir::def_id::DefId;
+use rustc_hir::intravisit::{self, NestedVisitorMap, Visitor};
use rustc_span::symbol::sym;
use rustc_span::Span;
use syntax::ast;