public function column_cb( $user ) {
		if ( is_super_admin( $user->ID ) ) {
			return;
		}
		?>
		<label class="screen-reader-text" for="blog_<?php echo $user->ID; ?>">
			<?php
			/* translators: %s: User login. */
			printf( __( 'Select %s' ), $user->user_login );
			?>
		</label>
		<input type="checkbox" id="blog_<?php echo $user->ID; ?>" name="allusers[]" value="<?php echo esc_attr( $user->ID ); ?>" />
		<?php
	}