# 2 question about UA driver

**URL:** <https://forum.inductiveautomation.com/t/2-question-about-ua-driver/3809>\
**Category:** Module Development\
**Created:** [December 26, 2011, 9:50am UTC](https://forum.inductiveautomation.com/t/2-question-about-ua-driver/3809 "2011-12-26T09:50:32Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![wengzijue](https://avatars.discourse-cdn.com/v4/letter/w/ee59a6/32.png) [@wengzijue](https://forum.inductiveautomation.com/u/wengzijue)\
**Post date:** [December 26, 2011, 9:50am UTC](https://forum.inductiveautomation.com/t/2-question-about-ua-driver/3809/1 "2011-12-26T09:50:32Z")

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1.Is com.inductiveautomation.opcua.nodes.NodeManager and com.inductiveautomation.opcua.nodes.builders.NodeBuilderFactory included in your javadoc,if not ,please give me some explaination about these class.  
2.when are "List\<? extends ReadItem\> " in the param of function “createReadRequest” and “optimizeRead” created,are they created according to the node build in function  
“buildNode”  
Thank you very much.