anchor.diff:      }
     }
   
  -  String emitScalarVar(DartType tp, {bool isLhs = false, RhsFilter rhsFilter}) {
  +  // Pick an existing variable of the given type.
  +  String pickScalarVar(DartType tp, {bool isLhs = false, RhsFilter rhsFilter}) {
       // Randomly specialize interface type, unless emitting left hand side.
       if (!isLhs) tp = maybeSpecializeInterface(tp);
       // Collect all choices from globals, fields, locals, and parameters.
  
positive.code:     emitHeader();
      emitVariableDeclarations(varName, globalVars);
      emitMethods(globalMethods);
      emitClasses();
      emitMain();
      // Sanity.
  
negative.code: // Version of DartFuzz. Increase this each time changes are made
  // to preserve the property that a given version of DartFuzz yields
  // the same fuzzed program for a deterministic random seed.
  const String version = '1.69';
  
  // Restriction on statements and expressions.
  const int stmtDepth = 1;
  