Firestore/src/Admin/V1/FieldOperationMetadata/IndexConfigDelta.php
public function setChangeType($var)
    {
        GPBUtil::checkEnum($var, \Google\Cloud\Firestore\Admin\V1\FieldOperationMetadata_IndexConfigDelta_ChangeType::class);
        $this->change_type = $var;

        return $this;
    }
public function setChangeType($var)
    {
        GPBUtil::checkEnum($var, \Google\Cloud\Firestore\Admin\V1\FieldOperationMetadata_IndexConfigDelta_ChangeType::class);
        $this->change_type = $var;

        return $this;
    }
public function setChangeType ( $ var ) { GPBUtil :: checkEnum ( $ var , \ Google \ Cloud \ Firestore \ Admin \ V1 \ FieldOperationMetadata_IndexConfigDelta_ChangeType :: class ) ; $ this -> change_type = $ var ; return $ this ; }
Specifies how the index is changing.

Generated from protobuf field <code>.google.firestore.admin.v1.FieldOperationMetadata.IndexConfigDelta.ChangeType change_type = 1;</code>
@param int $var
@return $this
Specifies how the index is changing .