Add default case for when static methods do not matched known ones.

Though, I'm not exactly sure why we are doing this.

Author: khatchad

edu.cuny.hunter.streamrefactoring.core/src/edu/cuny/hunter/streamrefactoring/core/analysis/Stream.java

@@ -583,6 +583,9 @@ private void inferInitialOrdering() throws IOException, CoreException, ClassHier
 				else
 					this.setInitialOrdering(Ordering.ORDERED);
 				break;
+			default:
+				throw new IllegalStateException(
+						"Unhandled expression type qualified name: " + expressionTypeQualifiedName);
 			}
 		} else { // instance method.
 			int valueNumber = getUseValueNumberForCreation();