[flexcoders] How can i view the source of the playerglobal.swc,rpc.swc and so on~

[jonickworn]

How can i view the source of the playerglobal.swc,rpc.swc and so on~

when i click the link in flex builder,it shows error:
"Source could not be found for mx.rpc.http.HTTPService in ..... 
\frameworks\libs\rpc.swc~"

thanks~