[Question] Image-like component with own asset manager

Hi everyone! I have a question about my problem, which I want to solve for about 1 month. The question is: Can I create a component, like a image component, so when I drop it, it will open my own asset manager, that will not overwrite original asset manager, so Image component will have same functionality as it has now. I wrote simple modal, where you can search for images online, but this modal overwrites original asset manager:

 const modal = editor.Modal;
 
  modal.open({
         title: '<br>Pixabay plugin<br>',
         content: `
           <div class="container">
               <form id="search-form">
                <input type="text" id="search-photos">
               </form>
               <div id="forPhotos">
               </div>
               </div>`,
     });
 

When I drop image block, this modal appears instead of original asset manager, and now the second problem, I wanted to overwrite open-assets command, which I found here on the forum like this:

            window.editor.Commands.add("open-asset", {
                run(editor, sender, opts) {
                    setTimeout(() => {
                        opts.target.set('src', 'https://via.placeholder.com/150');
                    },  1);
                }
            });

So, when I drop image component, it will really add image to the page, but when I try to rename command to:

            window.editor.Commands.add("mycommand", {
                run(editor, sender, opts) {
                    setTimeout(() => {
                        opts.target.set('src', 'https://via.placeholder.com/150');
                    },  1);
                }
            });

And then execute it, it will not work, because I don´t know, what that parameter in method means and I dont know, how to call it, I thought about something like this: window.editor.runCommand("mycommand", /* Some parameters? */); So, please, is there a way how to achieve that I will have my own command, own component and modal, that will be separated from the open-assets and Image block and it will work in the same way as an image block? Then I drop it, it will open modal, I will search for image, click on this image and then it will drop to the page. Modal functionality and block component are already done, but I really dont know, how to separate it and how to call it properly, that it will drop image right to the page.

Finally, sorry for my English, I'm still not very advanced in it, but I hope you understand my problem. Thank you for your time and your suggestions. Have a nice day. E. H.