JAVA代码优化,求解这段代码如何优化

if (CollectionUtils.isNotEmpty(snapshotFields)) {
            //字段转换为map
            Map<Long, TDatasetFieldSnapshot> fieldSnapshotMap = snapshotFields.stream()
                    .collect(toMap(TDatasetFieldSnapshot::getId, item -> item));

            //过滤字段
            List<FieldFilterModel> fieldFilterModels = vo.getFilterFields();

            if (CollectionUtils.isNotEmpty(fieldFilterModels)) {
                fieldFilterModels.stream()
                        .filter(item -> item != null && item.getId() != null)
                        .forEach(item -> {
                            TDatasetFieldSnapshot fieldSnapshot = fieldSnapshotMap.get(item.getId());
                            String field = fieldSnapshot != null ? fieldSnapshot.getField() : null;
                            if (field != null) {
                                item.setField(field);
                            }
                        });
            }

            //指标字段
            List<FieldModel> fieldModels = vo.getFields();
            if (CollectionUtils.isNotEmpty(fieldModels)) {
                fieldModels.stream()
                        .filter(item -> item != null && item.getId() != null)
                        .forEach(item -> {
                            TDatasetFieldSnapshot fieldSnapshot = fieldSnapshotMap.get(item.getId());
                            String field = fieldSnapshot != null ? fieldSnapshot.getField() : null;
                            if (field != null) {
                                item.setField(field);
                            }
                        });
            }
}

删掉多余的空行

lambda用的很熟练，但是过度使用很不便于阅读

你要优化啥啊？