def initialize(volume_info)
@id = volume_info["id"]
@display_name = volume_info["display_name"] || volume_info["displayName"]
@display_description = volume_info["display_description"] || volume_info["displayDescription"]
@size = volume_info["size"]
@volume_type = volume_info["volume_type"] || volume_info["volumeType"]
@metadata = volume_info["metadata"]
@availability_zone = volume_info["availability_zone"] || volume_info["availabilityZone"]
@snapshot_id = volume_info["snapshot_id"] || volume_info["snapshotId"]
@attachments = volume_info["attachments"]
@created_at = volume_info["created_at"] || volume_info["createdAt"]
@status = volume_info["status"]
end