canPlace() Netscript Function
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.. js:function:: canPlace(worldX, worldY, fragmentId)

    :RAM cost: 0.5 GB
    :param int worldX: World X against which to align the top left of the fragment.
    :param int worldY: World Y against which to align the top left of the fragment.
    :param int fragmentId: ID of the fragment to place.
    :returns: `true` if the fragment can be placed at that position. `false` otherwise.

    Example:

    .. code-block:: javascript
        canPlace(0, 4, 17); // returns true