[jOOQ/jOOQ#10936] Add DataType.null_() and notNull() as synonyms for nullable(boolean)

jOOQ/src/main/java/org/jooq/DataType.java

@@ -326,6 +326,22 @@ public interface DataType<T> extends Named {
      */
     boolean nullable();
 
+    /**
+     * Synonym for {@link #nullable(boolean)}, passing <code>true</code> as an
+     * argument.
+     */
+    @NotNull
+    @Support
+    DataType<T> null_();
+
+    /**
+     * Synonym for {@link #nullable(boolean)}, passing <code>false</code> as an
+     * argument.
+     */
+    @NotNull
+    @Support
+    DataType<T> notNull();
+
     /**
      * Return a new data type like this, with a new collation.
      */

jOOQ/src/main/java/org/jooq/impl/AbstractDataType.java

@@ -137,6 +137,16 @@ abstract class AbstractDataType<T> extends AbstractNamed implements DataType<T>
         return nullability().nullable();
     }
 
+    @Override
+    public final DataType<T> null_() {
+        return nullable(true);
+    }
+
+    @Override
+    public DataType<T> notNull() {
+        return nullable(false);
+    }
+
     @Override
     public final DataType<T> collation(Collation c) {
         return construct(precision0(), scale0(), length0(), nullability(), c, characterSet(), identity(), defaultValue());