okhttp3.TrailersSource -> eg7:
# {"id":"sourceFile","fileName":"TrailersSource.kt"}
    okhttp3.TrailersSource EMPTY -> H
      # {"id":"com.android.tools.r8.residualsignature","signature":"Ld96;"}
    1:2:void <clinit>():40:40 -> <clinit>
    3:5:void okhttp3.TrailersSource$Companion$EMPTY$1.<init>():40:40 -> <clinit>
    3:5:void <clinit>():40 -> <clinit>
    6:8:void <clinit>():40:40 -> <clinit>
