Gst.Query.prototype.set_nth_allocation_param

function set_nth_allocation_param(index:Number, allocator:Gst.Allocator, params:Gst.AllocationParams):void {
    // Gjs wrapper for gst_query_set_nth_allocation_param()
}

Parse an available query and get the alloctor and its params at index of the allocator array.

index: position in the allocator array to set
allocator: new allocator to set
params: parameters for the allocator