Use named arguments instead of default arguments
Use named arguments instead of default arguments

Summary:
In my opinion, the defaults made this code less obvious than it could be.
`_object` is used for both object types and interfaces, but only the former
allows exact and only the latter allows static.

Being explicit about these flags makes the API easier to use correctly, and only
required passing 1 additional explicit arg.

Reviewed By: mroch

Differential Revision: D4268733

fbshipit-source-id: 7896d5ea044cbfcce069afd60931219cf165804f

mroch/flow,nmote/flow,gabelevi/flow,fletcherw/flow,jamesgpearce/flow,gabelevi/flow,popham/flow,MichaelDeBoey/flow,AgentME/flow,nmote/flow,mroch/flow,fletcherw/flow,facebook/flow,jamesgpearce/flow,facebook/flow,facebook/flow,popham/flow,nmote/flow,jamesgpearce/flow,ylu1317/flow,fletcherw/flow,nmote/flow,gabelevi/flow,nmote/flow,AgentME/flow,gabelevi/flow,TiddoLangerak/flow,samwgoldman/flow,ForbesLindesay/flow,gabelevi/flow,gabro/flow,JonathanUsername/flow,JonathanUsername/flow,ylu1317/flow,fletcherw/flow,AgentME/flow,jamesgpearce/flow,mroch/flow,facebook/flow,TiddoLangerak/flow,ForbesLindesay/flow,claudiopro/flow,MichaelDeBoey/flow,mroch/flow,TiddoLangerak/flow,popham/flow,facebook/flow,popham/flow,JonathanUsername/flow,MichaelDeBoey/flow,samwgoldman/flow,gabro/flow,TiddoLangerak/flow,fletcherw/flow,JonathanUsername/flow,AgentME/flow,jamesgpearce/flow,claudiopro/flow,ForbesLindesay/flow,ylu1317/flow,ylu1317/flow,claudiopro/flow,popham/flow,gabelevi/flow,samwgoldman/flow,ForbesLindesay/flow,claudiopro/flow,mroch/flow,ForbesLindesay/flow,gabro/flow,gabro/flow,JonathanUsername/flow,JonathanUsername/flow,samwgoldman/flow,claudiopro/flow,facebook/flow,jamesgpearce/flow,MichaelDeBoey/flow,mroch/flow,AgentME/flow,nmote/flow,ForbesLindesay/flow,TiddoLangerak/flow,ylu1317/flow,nmote/flow,facebook/flow,JonathanUsername/flow,jamesgpearce/flow,MichaelDeBoey/flow,mroch/flow,samwgoldman/flow,popham/flow,fletcherw/flow,gabro/flow,samwgoldman/flow,gabelevi/flow,popham/flow,gabro/flow,samwgoldman/flow