title: org.apache.logging.log4j.core.Logger vs org.apache.logging.log4j.Logger
body: <p>Can anyone explain the difference between the <code>org.apache.logging.log4j.core.Logger</code> and <code>org.apache.logging.log4j.Logger</code>?   </p>
  
  <p>Sorry if this is a broad question but most documentation just talks about Logger and I don't know why there are 2 of them. Is there an easy way to convert between them? To put it another way can you explain what core signifies?</p>