@Override
  public Schema apply() {
    syncSchema(keyedTable);
    Schema newSchema = baseTableUpdateSchema.apply();
    changeTableUpdateSchema.apply();

    return newSchema;
  }
Apply the pending changes to the original schema and returns the result.

<p>This does not result in a permanent update.

@return the result Schema when all pending updates are applied
amoro-format-iceberg/src/main/java/org/apache/amoro/op/KeyedSchemaUpdate.java