Concrete TextEditingDelta implementations such as TextEditingDeltaReplacement, TextEditingDeltaInsertion, TextEditingDeltaDeletion, and TextEditingDeltaNonTextUpdate, should define a toString method for debugging purposes.

Use case

Having a toString definition that clearly defines an objects fields is useful in debugging.

Proposal

Add an implementation of toString for concrete TextEditingDelta implementations in the framework.