[JENKINS-36629] Use a name that does not assume on disk storage of run records

core/src/main/java/hudson/model/Job.java

@@ -1159,7 +1159,7 @@ public abstract class Job<JobT extends Job<JobT, RunT>, RunT extends Run<JobT, R
             if (runs instanceof RunMap) {
                 RunMap<RunT> runMap = (RunMap<RunT>) runs;
                 for (int index = i.getNumber(); index > u.getNumber() && totalCount < 5; index--) {
-                    if (runMap.diskContains(index)) {
+                    if (runMap.runExists(index)) {
                         totalCount++;
                     }
                 }

core/src/main/java/jenkins/model/lazy/AbstractLazyLoadRunMap.java

@@ -293,14 +293,14 @@ public abstract class AbstractLazyLoadRunMap<R> extends AbstractMap<Integer,R> i
     }
 
     /**
-     * Checks if the disk index contains the specified build number.
+     * Checks if the the specified build exists.
      *
      * @param number the build number to probe.
-     * @return {@code true} if there is an on disk entry for the corresponding number, note that this does not mean that
-     * the corresponding build record will load.
-     * @since 2.14
+     * @return {@code true} if there is an run for the corresponding number, note that this does not mean that
+     * the corresponding record will load.
+     * @since FIXME
      */
-    public boolean diskContains(int number) {
+    public boolean runExists(int number) {
         return numberOnDisk.contains(number);
     }