 number of channels in the output.   approximate (str, optional, defaults to "none") — If "tanh", use tanh approximation.   bias (bool, defaults to True) — Whether to use a bias in the linear layer.    GELU activation function with tanh approximation support with approximate="tanh".  GEGLU  class diffusers.models.activations.GEGLU  < source > ( dim_in: int dim_out: int bias: bool = True  )   Parameters   dim_in (int) — The number of channels in