function isValidDirectedEdge(edgeIndex) {
    const [lower, upper] = h3IndexToSplitLong(edgeIndex);
    return Boolean(H3.isValidDirectedEdge(lower, upper));
}
Whether the input is a valid unidirectional edge
@static
@param  {H3IndexInput} edgeIndex H3 index of the edge
@return {boolean}           Whether the index is valid