Clarify safe parts of the API in more detail.
Clarify safe parts of the API in more detail.

sarcher/dbal,mariuz/dbal,mathroc/dbal,vutung2311/dbal,webonyx/dbal,bspeterson/dbal,shivergard/dbal,lcobucci/dbal,AlexDpy/dbal,nfrignani/dbal,doctrine/dbal,easybiblabs/dbal,LionwareSolutions/dbal,DHager/dbal,janschoenherr/dbal,deeky666/dbal,mRoca/dbal,zeroedin-bill/dbal,arima-ryunosuke/dbal,PowerKiKi/dbal,zeroedin-bill/dbal,mihai-stancu/doctrine-dbal,mariuz/dbal,stchr/dbal,helicon-os/doctrine-dbal,hason/dbal,hason/dbal,lafourchette/dbal,lafourchette/dbal,LionwareSolutions/dbal,stof/dbal,mihai-stancu/dbal,mikeSimonson/dbal,mathroc/dbal,nfrignani/dbal,kimhemsoe/dbal,Tobion/dbal,PowerKiKi/dbal,cassvail/dbal,v-bartusevicius/dbal,vutung2311/dbal,wuxu92/dbal,mikeSimonson/dbal,sarcher/dbal,hason/dbal,deeky666/dbal,webonyx/dbal,gencer/dbal,gencer/dbal,mRoca/dbal,tk-s/dbal,adrienbrault/dbal,adrienbrault/dbal,v-bartusevicius/dbal,vortgo/dbal,kimhemsoe/dbal,helicon-os/doctrine-dbal,DHager/dbal,janschoenherr/dbal,wuxu92/dbal,stof/dbal,Tobion/dbal,webonyx/dbal,vortgo/dbal,mihai-stancu/dbal,AlexDpy/dbal,arima-ryunosuke/dbal,mbeccati/dbal,bspeterson/dbal,BenMorel/dbal,drieschel/dbal,LionwareSolutions/dbal,stchr/dbal,mbeccati/dbal,easybiblabs/dbal,mariuz/dbal,arima-ryunosuke/dbal,mihai-stancu/doctrine-dbal,drieschel/dbal,BenMorel/dbal,cassvail/dbal,lcobucci/dbal,doctrine/dbal,easybiblabs/dbal,sarcher/dbal,adrienbrault/dbal,PowerKiKi/dbal,tk-s/dbal,shivergard/dbal