code: def concat_tileable_chunks(cls, tileable):
      assert not tileable.is_coarse()
  
      op = cls(merge=True)
      chunk = cls(merge=True).new_chunk(tileable.chunks)
      return op.new_tileable(
          [tileable], chunks=[chunk], nsplits=((1,),)
      )
  
imports: from ...serialization.serializables import BoolField
  from ..entity import OutputType, register_fetch_class
  from .base import Operand
  from .core import TileableOperandMixin
  from .fetch import FetchMixin, Fetch
  from .fuse import Fuse, FuseChunkMixin
label_desc: Use image node_id 3 for calling the MergeDictOperand obj's underlying member method code with example usage: obj.concat_tileable_chunks(cls, tileable) and returns: op