src/Fields/Image.php
public function outputColumnContent($post_id)
    {
        $meta = get_post_meta($post_id, $this->id, true);

        echo wp_get_attachment_image($meta, [100, 100]);
    }
public function outputColumnContent($post_id)
    {
        $meta = get_post_meta($post_id, $this->id, true);

        echo wp_get_attachment_image($meta, [100, 100]);
    }
public function outputColumnContent ( $ post_id ) { $ meta = get_post_meta ( $ post_id , $ this -> id , true ) ; echo wp_get_attachment_image ( $ meta , [ 100 , 100 ] ) ; }
Output column content.

@param  string $post_id
@return string
Output column content .