class_docstr: Series decomposition block.
class_docstr_tok: ["Series","decomposition","block","."]
code: def _build(self):
      return self._SeriesDecomposer(self.kernel_size)
  
imports: from sktime.utils.validation._dependencies import _check_soft_dependencies
  import math
label_desc: Use image node_id 2 for calling the SeriesDecomposer obj's underlying member method code with example usage: obj._build() and returns: self