The destroyPart event indicates the part and its children have been destroyed and all associated resources have been released.

An errorBlock event indicates a change in the block of code that's run when an error occurs in the data access code.

An isInDatabase event indicates a change in the result row which came from the database.

An isNotInDatabase event indicates a change in the result row which is a new row and did not come from the database.

A lastError event indicates the last error that occurred has changed.

A self event indicates that the value of the target part itself has changed.

A valueHolder event indicates a change in the value of the variable or class.