Instert an icon inside of an EnumProperty ? is it possible? (addon UI) i tried to insert some icon in an enumproperty

test_context: bpy.props.EnumProperty(
    name = 'Context',
    description = '',
    items = [
        ('GENERAL', 'General', '', icon='BLENDER'),
        ('FILEPATHS', 'File Paths', '', icon='KEYINGSET')],
    default = 'GENERAL')


this is obviously not working and i didnt saw any example out there, nothing in the documentation either. 
i saw this question but it didnt help
How to add custom icon to EnumProperty in add-on

does someone here know how to do this ? is this even possible ? 

original

test_context: bpy.props.EnumProperty(
    name = 'Context',
    description = '',
    items = [
        ('GENERAL', 'General', '', icon='BLENDER'),
        ('FILEPATHS', 'File Paths', '', icon='KEYINGSET')],
    default = 'GENERAL')
test_context: bpy.props.EnumProperty(
    name = 'Context',
    description = '',
    items = [
        ('GENERAL', 'General', '', 'BLENDER',1),
        ('FILEPATHS', 'File Paths', '', 'KEYINGSET',2)],
    default = 'GENERAL')