WP_User_Query with meta_query array relation ‘OR’

From the Codex:
Multiple custom user fields handling

$args = array(
'meta_query' => array(
    'relation' => 'OR',
    0 => array(
        'key'     => 'country',
        'value'   => 'Israel',
        'compare' => '='
    ),
    1 => array(
        'key'     => 'age',
        'value'   => array( 20, 30 ),
        'type'    => 'numeric',
        'compare' => 'BETWEEN'
    )
)
);

Try adding the 0 => array and 1 => array

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