2.90 "keyword "apply_as" unrecognized" - Error

Question

Using 2.90.0 Beta, I get a
TypeError: Converting py args to operator properties: : keyword "apply_as" unrecognized
I believe this is coming from a Boolean modifier:
    context = bpy.context
    scene = context.scene
    tX = scene.objects.get("tX")
    tCut = scene.objects.get("tCut")
    if tX and tCut:
        bool = tX.modifiers.new(name='bool', type='BOOLEAN')
        bool.object = tCut
        bool.operation = 'DIFFERENCE'
        bpy.ops.object.modifier_apply(
                {"object": tX},
                apply_as='DATA',
                modifier=bool.name)

What's interesting is it's mentioning two other python files:
Error: Traceback (most recent call last):
  File "C:Users"user"DesktopBlender2.902.90scriptsstartuppanel_sidebar.py", line 131, in execute
    modifier=bool.name)
  File "C:Users"user"DesktopBlender2.902.90scriptsmodulesbpyops.py", line 199, in __call__
    ret = op_call(self.idname_py(), C_dict, kw, C_exec, C_undo)
TypeError: Converting py args to operator properties: : keyword "apply_as" unrecognized

location: <unknown location>:-1

The panel_sidebar.py also contains the boolean function, but it wasn't being utilized. It throws a different error when it is utilized:
Error: Traceback (most recent call last):
  File "panel_sidebar.py", line 125, in execute
    bool = tX.modifiers.new(name='bool', type='BOOLEAN')
AttributeError: type object 'tX' has no attribute 'modifiers'

The ops.py has never been touched. All of this has been working fine in 2.82 & 2.83. Thank you

AFWS · Answer

This is not specific to boolean modifier. There was changes to python for modifiers. Remove the apply_as='DATA' and it should work.
Before we did
for data
bpy.ops.object.modifier_apply(apply_as='DATA')

for shapekey
bpy.ops.object.modifier_apply(apply_as='SHAPE')

Now we do
for data
bpy.ops.object.modifier_apply()

for apply shapekey
bpy.ops.object.modifier_apply_as_shapekey(keep_modifier=False)

for save shapekey
bpy.ops.object.modifier_apply_as_shapekey(keep_modifier=True)

To use multiple versions of Blender, you can do like this.
version = bpy.app.version

if version >= (2, 91, 0):
    bpy.ops.object.modifier_apply()    
else;    
    bpy.ops.object.modifier_apply(apply_as='DATA')

2.90 "keyword "apply_as" unrecognized" - Error

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