fillModeString(default: 'solid')
Controls how the color is applied to the button. Valid values are: "solid", and "none".
Example
<div id="fab-solid"></div>
<div id="fab-none"></div>
<script>
$("#fab-solid").kendoFloatingActionButton({
icon: "plus",
fillMode: "solid"
});
$("#fab-none").kendoFloatingActionButton({
icon: "plus",
fillMode: "none"
});
</script>
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