code: function( keyCode ) {
  			if ( typeof keyCode == 'number' ) {
  				var last = this.getLast( keyCode );
  
  				if ( !last ) { // %REMOVE_LINE%
  					throw new Error( 'Trying to reset inputs count, but could not found by keyCode: ' + keyCode + '.' ); // %REMOVE_LINE%
  				} // %REMOVE_LINE%
  
  				last.inputs = 0;
  			} else {
  				var i = this.stack.length;
  				while ( i-- ) {
  					this.stack[ i ].inputs = 0;
  				}
  			}
  		}
docs: Resets the `inputs` value to `0` for a given `keyCode` or in entire stack if a
  `keyCode` is not specified.
  
  @param {Number} [keyCode]