Use map method directly if possible

JDT provides a new cleanup which allows to transform code to call
methods directly on map instead of accessing the values or the keys
before calling the same method.

Saves code which we have to read and might be slightly faster.

Change-Id: I0f668adcf508f3f8efdf01e36105a22251c25540
Signed-off-by: Lars Vogel <Lars.Vogel@vogella.com>
diff --git a/org.eclipse.jdt.debug/META-INF/MANIFEST.MF b/org.eclipse.jdt.debug/META-INF/MANIFEST.MF
index 6c403be..035580b 100644
--- a/org.eclipse.jdt.debug/META-INF/MANIFEST.MF
+++ b/org.eclipse.jdt.debug/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@
 Bundle-ManifestVersion: 2
 Bundle-Name: %pluginName
 Bundle-SymbolicName: org.eclipse.jdt.debug; singleton:=true
-Bundle-Version: 3.15.0.qualifier
+Bundle-Version: 3.15.100.qualifier
 Bundle-ClassPath: jdi.jar,
  jdimodel.jar,
  tools.jar
diff --git a/org.eclipse.jdt.debug/jdi/org/eclipse/jdi/internal/ReferenceTypeImpl.java b/org.eclipse.jdt.debug/jdi/org/eclipse/jdi/internal/ReferenceTypeImpl.java
index 7d2b1ee..2c85a92 100644
--- a/org.eclipse.jdt.debug/jdi/org/eclipse/jdi/internal/ReferenceTypeImpl.java
+++ b/org.eclipse.jdt.debug/jdi/org/eclipse/jdi/internal/ReferenceTypeImpl.java
@@ -1725,7 +1725,7 @@
 	private Stratum getStratum(String stratumId) {
 		if (!VirtualMachineImpl.JAVA_STRATUM_NAME.equals(stratumId)
 				&& isSourceDebugExtensionAvailable()) {
-			if (stratumId == null || !fStrata.keySet().contains(stratumId)) {
+			if (stratumId == null || !fStrata.containsKey(stratumId)) {
 				stratumId = fDefaultStratumId;
 			}
 			if (!VirtualMachineImpl.JAVA_STRATUM_NAME.equals(stratumId)) {
diff --git a/org.eclipse.jdt.debug/pom.xml b/org.eclipse.jdt.debug/pom.xml
index abe6916..2ecf1dc 100644
--- a/org.eclipse.jdt.debug/pom.xml
+++ b/org.eclipse.jdt.debug/pom.xml
@@ -18,7 +18,7 @@
   </parent>
   <groupId>org.eclipse.jdt</groupId>
   <artifactId>org.eclipse.jdt.debug</artifactId>
-  <version>3.15.0-SNAPSHOT</version>
+  <version>3.15.100-SNAPSHOT</version>
   <packaging>eclipse-plugin</packaging>
   <properties>
     <maven.compiler.release>8</maven.compiler.release>