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function nomad_social_icons( $icons ) {
    $icons = array(
	    'nomad',
        'facebook',
        'twitter',
        'google',
        'linkedin',
        'yelp',
        'pinterest',
        'tumblr',
        'vimeo',
        'youtube',
        'flickr',
        'instagram',
        'dribbble',
        '500px',
        'blogger',
        'github',
        'rss',
        'email'
    );
    return $icons;
}
add_filter( 'fl_social_icons', 'nomad_social_icons' );

function nomad_customize_register( $customizer )
{
	$customizer->add_setting( 'fl-social-nomad', array( 
		'default' => '' 
	) );
	
	$customizer->add_control(
		new WP_Customize_Control( $customizer, 'fl-social-nomad', array(
			'label' 	=> 'Nomad',
			'section' 	=> 'fl-social-links'
		) )
	);
}
add_action( 'customize_register', 'nomad_customize_register' );