class_docstr: Gain effect processor
code: def name():
      return "Gain effect"
  
file_path: TimeSide/timeside/plugins/fx/gain.py
imports: from timeside.core import Processor, implements, interfacedoc
  from timeside.core.api import IEffect
  import numpy
label_desc: Use image node_id 4 for calling the Gain obj's underlying member method code with example usage: obj.name() and returns: str