There is default implementation of ISuppressErrors node attribute. It can be applied only to nodes that are instances of ICanSuppressErrors.
Here is an example of using this attribute and corresponding intention:
There is an error in editor:
BaseLanguage Statement imlpements ICanSuppressErrors, so user can apply highlighted intention here:
Now the error isn't highlighted, but there is a cross icon in the left pane. SuppressErrorsAttribute can be removed either by pressing on that cross or by applying corresponding intention