blockVolumePlugin, err :=
		og.volumePluginMgr.FindMapperPluginBySpec(volumeToMount.VolumeSpec)
	if err != nil {
		return volumetypes.GeneratedOperations{}, volumeToMount.GenerateErrorDetailed("MapVolume.FindMapperPluginBySpec failed", err)
	}

	if blockVolumePlugin == nil {

	}

	generatedVolumeName, err := util.GetUniqueVolumeNameFromSpec(
		plugin, volumeSpec)
	require.NoError(t, err)

	blockplugin, err := volumePluginMgr.FindMapperPluginBySpec(volumeSpec)
	if err != nil {
		t.Fatalf(
			"volumePluginMgr.FindMapperPluginBySpec failed to find volume plugin for %#v with: %v",
			volumeSpec,
			err)
	}

	volumeName, err := util.GetUniqueVolumeNameFromSpec(
		plugin, volumeSpec)

	}

	if expandableVolumePlugin, ok := volumePlugin.(ExpandableVolumePlugin); ok {
		return expandableVolumePlugin, nil
	}
	return nil, nil
}

// FindMapperPluginBySpec fetches a block volume plugin by spec.
func (pm *VolumePluginMgr) FindMapperPluginBySpec(spec *Spec) (BlockVolumePlugin, error) {
	volumePlugin, err := pm.FindPluginBySpec(spec)
	if err != nil {
		return nil, err
	}

			volumePlugins:  []volume.VolumePlugin{},
			expectErr:      true,
			expectedErrMsg: "MapVolume.FindMapperPluginBySpec failed",
		},
		"blockVolumePlugin is nil": {
			volumePlugins:  volumetesting.NewFakeFileVolumePlugin(),
			expectErr:      true,
			expectedErrMsg: "MapVolume.FindMapperPluginBySpec failed to find BlockVolumeMapper plugin. Volume plugin is nil.",
		},
	}