public T automaticMergeHead(Boolean automaticMergeHead) {
        parameter().setAutomaticMergeHead(automaticMergeHead);
        return self();
    }
Whether to automatically merge headers.Default is true.

@param automaticMergeHead
@return
fastexcel-core/src/main/java/cn/idev/excel/write/builder/AbstractExcelWriterParameterBuilder.java