exposed data types in builder

src/main/java/gov/usgs/earthquake/nshmp/calc/CalcConfig.java

@@ -802,9 +802,10 @@ public final class CalcConfig {
 
     private Output(Builder b) {
       this.directory = b.directory;
-      b.dataTypes.add(DataType.TOTAL);
-      b.dataTypes.add(DataType.MAP);
-      this.dataTypes = Collections.unmodifiableSet(b.dataTypes);
+      Set<DataType> dataTypes = EnumSet.copyOf(b.dataTypes);
+      dataTypes.add(DataType.TOTAL);
+      dataTypes.add(DataType.MAP);
+      this.dataTypes = Collections.unmodifiableSet(dataTypes);
       this.returnPeriods = List.copyOf(b.returnPeriods);
     }
 
@@ -1028,6 +1029,16 @@ public final class CalcConfig {
       return this;
     }
 
+    /**
+     * Set the data types for which results should be calculated.
+     *
+     * @see gov.usgs.earthquake.nshmp.calc.CalcConfig.Hazard#imts
+     */
+    public Builder dataTypes(Set<DataType> dataTypes) {
+      this.output.dataTypes = checkNotNull(dataTypes);
+      return this;
+    }
+
     /**
      * Set the timespan for earthquake probabilities. Calling this method also
      * sets {@link Rate#valueFormat} to {@link ValueFormat#POISSON_PROBABILITY}