method replaceColumn

Source

void replaceColumn(SchemaColumn existingColumn, SchemaColumn newColumn) {
  existingColumn = this[existingColumn.name];
  if (existingColumn == null) {
    throw new SchemaException("Column ${existingColumn.name} does not exist on $name.");
  }

  var index = _columnStorage.indexOf(existingColumn);
  _columnStorage[index] = newColumn;
  newColumn.table = this;
  existingColumn.table = null;
}