Trouble compiling httpcomponents-client-4.5.2 due to missing org.apache.http.annotation.Immutable and org.apache.http.annotation.NotThreadSafe classes

[Sachin Nikumbh]

Hi

I am trying to compile httpcomponents-client-4.5.2 and it's failing to find
bunch of classes including org.apache.http.annotation.Immutable,
org.apache.http.annotation.NotThreadSafe. Which package are these classes
part of? I would like to include the source for them in my project.

Any help would be greatly appreciated.

Thanks
Sachin