Added check to ensure only method calls are parsed.
Added check to ensure only method calls are parsed.

Will support other expression forms after figuring out how to parameterize them.

Skysper/LiteDB,89sos98/LiteDB,prepare/LiteDB,prepare/LiteDB,RytisLT/LiteDB,falahati/LiteDB,RytisLT/LiteDB,Xicy/LiteDB,prepare/LiteDB,masterdidoo/LiteDB,mbdavid/LiteDB,icelty/LiteDB,89sos98/LiteDB,falahati/LiteDB,masterdidoo/LiteDB,prepare/LiteDB