the JMap layer id
the feature geometry
if layer not found, or invalid geometry, or layer has no form
 // opens the form creation dialog for layer id=3
 JMap.Form
   .openCreationDialogForLayer(
     3,
     {
       type: "Point",
       coordinates: [43.55843, 6.55121]
     }
   )
   .then(formsMetadata => console.log("Creation form dialog opened", formsMetadata))
   .catch(error => console.error(error))
JMap.Form.openCreationDialogForLayer
Opens the form creation dialog.