TwentyNineteen_SVG_Icons::get_social_link_svg( string $uri, int $size ): string|null

57	public static function get_social_link_svg( $uri, $size ) {58		static $regex_map; // Only compute regex map once, for performance.59		if ( ! isset( $regex_map ) ) {60			$regex_map = array();61			$map       = &self::$social_icons_map; // Use reference instead of copy, to save memory.62			foreach ( array_keys( self::$social_icons ) as $icon ) {63				$domains            = array_key_exists( $icon, $map ) ? $map[ $icon ] : array( sprintf( '%s.com', $icon ) );64				$domains            = array_map( 'trim', $domains ); // Remove leading/trailing spaces, to prevent regex from failing to match.65				$domains            = array_map( 'preg_quote', $domains );66				$regex_map[ $icon ] = sprintf( '/(%s)/i', implode( '|', $domains ) );67			}68		}69		foreach ( $regex_map as $icon => $regex ) {70			if ( preg_match( $regex, $uri ) ) {71				return self::get_svg( 'social', $icon, $size );72			}73		}74		return null;75	}