ECal.Client.modify_objects_sync

### Method

# ECal Clientmodify_objects_sync

since: 3.6

#### Declaration [src]

    gboolean
    e_cal_client_modify_objects_sync (
      ECalClient* client,
      GSList* icalcomps,
      ECalObjModType mod,
      ECalOperationFlags opflags,
      GCancellable* cancellable,
      GError** error
    )

#### Description [src]

Requests the calendar backend to modify existing objects. If an object does not exist on the calendar, an error will be returned.

For recurrent appointments, the `mod` argument specifies what to modify, if all instances (#E_CAL_OBJ_MOD_ALL), a single instance (#E_CAL_OBJ_MOD_THIS), or a specific set of instances (#E_CAL_OBJ_MOD_THIS_AND_PRIOR and

# E_CAL_OBJ_MOD_THIS_AND_FUTURE).

Available since: 3.6

#### Parameters

`icalcomps`

  Type: A list of `ICalComponent*`

  Components to modify.

  The data is owned by the caller of the method.

`mod`

  Type: `ECalObjModType`

  Type of modification.

`opflags`

  Type: `ECalOperationFlags`

  Bit-or of `ECalOperationFlags`.

`cancellable`

  Type: `GCancellable`

  A `GCancellable`; can be `NULL`.

  The argument can be `NULL`.
  The data is owned by the caller of the method.

`error`

  Type: `GError **`

  The return location for a recoverable error.

  The argument can be `NULL`.
  If the return location is not `NULL`, then you must initialize it to a `NULL` `GError*`.
  The argument will be left initialized to `NULL` by the method if there are no errors.
  In case of error, the argument will be set to a newly allocated `GError`; the caller will take ownership of the data, and be responsible for freeing it.

#### Return value

Type: `gboolean`

`TRUE` if successful, `FALSE` otherwise.