add bindings

Author: leandrogilcarrano

src/ApiBodyDocumentElement.js

@@ -617,6 +617,27 @@ export class ApiBodyDocumentElement extends AmfHelperMixin(LitElement) {
       <div slot="markdown-html" class="markdown-html" part="markdown-html" ?data-with-title="${hasTypeName}"></div>
     </arc-marked>` : ''}
 
+    ${this._isAsyncAPI(this.amf) && !!this.bindings ?
+      html`<ul class="bindings-container-list">
+        ${this.bindings.map(item => html`<li>
+          <p class="bindings-header">
+            <label>Message specific information:</label>
+            <span class="binding-type"> ${item.bindingType}</span>
+          </p>
+          ${item.key!==false ? 
+            html `
+            <div class="bindings-body">
+              <label>key</label>
+              <span class="binding-key">${item.key}</span>
+              <span class="binding-data-type">${item.dataType}</span>
+            </div>
+            `  
+          : ''}
+          
+        </li>`)}
+      </ul>`
+    : ''}
+
     ${_isObject ?
       html`<api-type-document
       .amf="${amf}"