func (txn *Txn) bufferFor(columnName string) *commit.Buffer {
	for _, c := range txn.updates {
		if c.Column == columnName {
			return c
		}
	}
	buffer := txn.owner.txns.acquirePage(columnName)
	txn.updates = append(txn.updates, buffer)
	return buffer
}
bufferFor loads or creates a buffer for a given column.
package column
import (
	"fmt"
	"github.com/kelindar/column/commit"
)