Capable of being annulled or invalidated.

Possible to replace with an alternative option.

Able to be disregarded in favor of another rule.

Allowing for modification or change by authority.

Subject to alteration based on new input or conditions.

Capability to be replaced or modified.

Property of allowing alternative implementations.

Feature that can be altered by subclasses.

Aspect permitting user-defined behavior changes.

Concept in programming for method flexibility control.