build_leading_column.dart

Column _buildLeadingColumn(BuildContext context) {
    return Column(
        mainAxisAlignment: MainAxisAlignment.center,
        crossAxisAlignment: CrossAxisAlignment.center,
        children: <Widget>[
          Container(
            height: 40,
            width: 40,
            decoration: BoxDecoration(
              borderRadius: BorderRadius.circular(10),
              color: Theme.of(context).primaryColor,
              boxShadow: [
                BoxShadow(
                  offset: Offset(3, 3),
                  color: Colors.black12,
                  blurRadius: 5,
                ),
                BoxShadow(
                  offset: Offset(-3, -3),
                  color: Colors.white,
                  blurRadius: 5,
                )
              ],
            ),
            child: Icon(
              Icons.arrow_back_ios,
              size: 14,
            ),
          ),
        ],
      );
  }