A first attempt at applying new directories with parent failovers to ACF local JSON

acf-local-json-before.php

<?php
// Integrating Advanced Custom Fields:
add_filter( 'acf/settings/save_json', function() {
    return get_stylesheet_directory() . '/Library/Acf-Json';
} );
add_filter( 'acf/settings/load_json', function( $paths ) {
    unset( $paths[0] );
    $paths[] = get_template_directory() . '/Library/Acf-Json';
    $paths[] = get_stylesheet_directory() . '/Library/Acf-Json';
    return $paths;
} );