test_class.file: ndbc-api/src/test/java/io/trane/ndbc/value/NullValueTest.java
test_class.identifier: NullValueTest
test_case.body: @Test
    public void isNull() {
      assertTrue(Value.NULL.isNull());
    }
test_case.class_method_signature: NullValueTest.isNull()
test_case.full_signature: @Test public void isNull()
test_case.identifier: isNull
test_case.invocations: assertTrue isNull
test_case.modifiers: @Test public
test_case.parameters: ()
test_case.return: void
test_case.signature: void isNull()
focal_class.file: ndbc-api/src/main/java/io/trane/ndbc/value/NullValue.java
focal_class.identifier: NullValue
focal_class.class_method_signature: NullValue.NullValue()
focal_class.full_signature: public  NullValue()
focal_class.identifier: NullValue
focal_class.modifiers: public
focal_class.parameters: ()
focal_class.signature:  NullValue()
focal_class.class_method_signature: NullValue.isNull()
focal_class.full_signature: @Override public final boolean isNull()
focal_class.identifier: isNull
focal_class.modifiers: @Override public final
focal_class.parameters: ()
focal_class.return: boolean
focal_class.signature: boolean isNull()
focal_class.superclass: extends Value<Object>
focal_method.body: @Override
    public final boolean isNull() {
      return true;
    }
focal_method.class_method_signature: NullValue.isNull()
focal_method.full_signature: @Override public final boolean isNull()
focal_method.identifier: isNull
focal_method.modifiers: @Override public final
focal_method.parameters: ()
focal_method.return: boolean
focal_method.signature: boolean isNull()