Bigtable/src/ReadModifyWriteRowRules.php
public function append($familyName, $qualifier, $value)
    {
        $this->rules[] = (new ReadModifyWriteRule)
            ->setFamilyName($familyName)
            ->setColumnQualifier($qualifier)
            ->setAppendValue($value);
        return $this;
    }
public function append($familyName, $qualifier, $value)
    {
        $this->rules[] = (new ReadModifyWriteRule)
            ->setFamilyName($familyName)
            ->setColumnQualifier($qualifier)
            ->setAppendValue($value);
        return $this;
    }
public function append ( $ familyName , $ qualifier , $ value ) { $ this -> rules [ ] = ( new ReadModifyWriteRule ) -> setFamilyName ( $ familyName ) -> setColumnQualifier ( $ qualifier ) -> setAppendValue ( $ value ) ; return $ this ; }
Appends the value to the existing value of the cell. If targeted cell is unset,
it will be treated as containing the empty string.

@param string $familyName Family name of the row.
@param string $qualifier Column qualifier of the row.
@param string $value Value of the Column qualifier.

@return ReadModifyWriteRowRules returns current ReadModifyWriteRowRules object.
Appends the value to the existing value of the cell . If targeted cell is unset it will be treated as containing the empty string .