title: Int placeholder on flutter localizations
body: <p>I'm trying to add a text entry to &quot;arb&quot; file with an int placeholder but without success as I'm getting the follow error:</p>
  <pre><code>Number format null for the times placeholder does not have a corresponding NumberFormat constructor.
  Check the intl library's NumberFormat class constructors for allowed number formats.
  Generating synthetic localizations package has failed.
  </code></pre>
  <p>The entry is the follow:</p>
  <pre><code>  &quot;increment_message&quot;: &quot;You have pushed the button this many times: {times}&quot;,
    &quot;@increment_message&quot;: {
      &quot;placeholders&quot;: {
        &quot;times&quot;: {
          &quot;type&quot;: &quot;int&quot;,
          &quot;example&quot;: &quot;123&quot;
        }
      }
    }
  </code></pre>
  <p>I know everything else is properly set because changing the placeholder to String things work:</p>
  <pre><code>  &quot;increment_message&quot;: &quot;You have pushed the button this many times: {times}&quot;,
    &quot;@increment_message&quot;: {
      &quot;placeholders&quot;: {
        &quot;times&quot;: {
          &quot;type&quot;: &quot;String&quot;,
          &quot;example&quot;: &quot;123&quot;
        }
      }
    }
  </code></pre>
  <p><a href="https://i.stack.imgur.com/BKLY1.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/BKLY1.png" alt="running app" /></a></p>
  <p>The complete code if you want to run is hosted on github here:</p>
  <p><a href="https://github.com/ademar111190/stack-overflow-question-arb-int" rel="nofollow noreferrer">Working using String</a></p>
  <p><a href="https://github.com/ademar111190/stack-overflow-question-arb-int/tree/failing-int" rel="nofollow noreferrer">Failing int branch</a></p>
  <p>So my question is, how to use integer placeholder on arb file, it seems something related to <code>NumberFormat</code> but I can't figure out how.</p>