org.slf4j.helpers.BasicMDCAdapter$1 -> u20:
# {"id":"sourceFile","fileName":"BasicMDCAdapter.java"}
    1:6:java.lang.Object childValue(java.lang.Object):48:48 -> childValue
    7:12:java.util.Map childValue(java.util.Map):54:54 -> childValue
    7:12:java.lang.Object childValue(java.lang.Object):48 -> childValue
