Gst.TagList.prototype.get_float
function get_float(tag:String):Boolean {
    // Gjs wrapper for gst_tag_list_get_float()
}Copies the contents for the given tag into the value, merging multiple values into one if multiple values are associated with the tag.
- tag
- tag to read out 
- Returns
- TRUE, if a value was copied, FALSE if the tag didn't exist in the given list.