code: function(value) {
  		if (this.resolved) {
  			throw new Error('Future resolved more than once');
  		}
  		this.value = value;
  		this.resolved = true;
  
  		var callbacks = this.callbacks;
  		if (callbacks) {
  			delete this.callbacks;
  			for (var ii = 0; ii < callbacks.length; ++ii) {
  				try {
  					var ref = callbacks[ii];
  					if (ref[1]) {
  						ref[1](value);
  					} else {
  						ref[0](undefined, value);
  					}
  				} catch(ex) {
  					// console.log('Resolve cb threw', String(ex.stack || ex.message || ex));
  					process.nextTick(function() {
  						throw(ex);
  					});
  				}
  			}
  		}
  	}
docs: Mark this future as returned. All pending callbacks will be invoked immediately.