Make sure element is not null when checking unparsed (#1163)

We need to bne sure it's not null.

Author: therve

.generator/templates/libraries/jersey2/pojo.mustache

@@ -111,9 +111,14 @@ public class {{classname}} {{#parent}}extends {{{.}}} {{/parent}}{{#vendorExtens
             {{/requiredVars}}
             ) {
         {{#requiredVars}}
-        this.{{name}} = {{name}};{{#allowableValues}}
+        this.{{name}} = {{name}};{{#isNullable}}
+        if ({{name}} != null) {
+{{/isNullable}}{{#allowableValues}}
         this.unparsed |= !{{name}}.isValid();{{/allowableValues}}{{#isModel}}{{^isPrimitiveType}}
         this.unparsed |= {{name}}.unparsed;{{/isPrimitiveType}}{{/isModel}}
+{{#isNullable}}
+        }
+{{/isNullable}}
         {{/requiredVars}}
   }
   {{/hasRequired}}
@@ -139,6 +144,9 @@ public class {{classname}} {{#parent}}extends {{{.}}} {{/parent}}{{#vendorExtens
     {{^vendorExtensions.x-is-jackson-optional-nullable}}
     this.{{name}} = {{name}};
     {{^isArray}}
+{{#isNullable}}
+        if ({{name}} != null) {
+{{/isNullable}}
     {{#allowableValues}}
     {{^isPrimitiveType}}
     this.unparsed |= !{{name}}.isValid();
@@ -149,6 +157,9 @@ public class {{classname}} {{#parent}}extends {{{.}}} {{/parent}}{{#vendorExtens
     this.unparsed |= {{name}}.unparsed;
     {{/isPrimitiveType}}
     {{/isModel}}
+{{#isNullable}}
+    }
+{{/isNullable}}
     {{/isArray}}
     {{#isArray}}
     {{#items.isModel}}

src/main/java/com/datadog/api/v2/client/model/LogsArchiveAttributes.java

@@ -61,14 +61,19 @@ public LogsArchiveAttributes(
       @JsonProperty(required = true, value = JSON_PROPERTY_NAME) String name,
       @JsonProperty(required = true, value = JSON_PROPERTY_QUERY) String query) {
     this.destination = destination;
-    this.unparsed |= destination.unparsed;
+    if (destination != null) {
+
+      this.unparsed |= destination.unparsed;
+    }
     this.name = name;
     this.query = query;
   }
 
   public LogsArchiveAttributes destination(LogsArchiveDestination destination) {
     this.destination = destination;
-    this.unparsed |= destination.unparsed;
+    if (destination != null) {
+      this.unparsed |= destination.unparsed;
+    }
     return this;
   }