Function gst_base_transform_set_allocator 

pub unsafe extern "C" fn gst_base_transform_set_allocator(
    trans: *mut GstBaseTransform,
    pool: *mut GstBufferPool,
    allocator: *mut GstAllocator,
    params: *const GstAllocationParams,
    query: *mut GstQuery,
) -> gboolean

Available on crate feature v1_30 only.