old_contents: import os
  import json
  
  from pluginsmanager.model.lv2.lv2_plugin import Lv2Plugin
  from pluginsmanager.model.lv2.lv2_effect import Lv2Effect
  
  
  class Lv2EffectBuilder(object):
      """
      Generates lv2 audio plugins instance (as :class:`Lv2Effect` object).
  
      .. note::
  
          In the current implementation, the data plugins are persisted
          in *plugins.json*.
      """
  
      def __init__(self, plugins_json=None):
          self.plugins = {}
  
          if plugins_json is None:
              plugins_json = os.path.dirname(__file__) + '/plugins.json'
  
          with open(plugins_json) as data_file:
              data = json.load(data_file)
  
          supported_plugins = self._supported_plugins
          for plugin in data:
              if plugin['uri'] in supported_plugins:
                  self.plugins[plugin['uri']] = Lv2Plugin(plugin)
  
      @property
      def _supported_plugins(self):
          import subprocess
          return str(subprocess.check_output(['lv2ls'])).split('\\n')
  
      @property
      def all(self):
          return self.plugins
  
      def build(self, lv2_uri):
          """
          Returns a new :class:`Lv2Effect` by the valid lv2_uri
  
          :param string lv2_uri:
          :return Lv2Effect: Effect created
          """
          return Lv2Effect(self.plugins[lv2_uri])
  
new_contents: import os
  import json
  
  from pluginsmanager.model.lv2.lv2_plugin import Lv2Plugin
  from pluginsmanager.model.lv2.lv2_effect import Lv2Effect
  
  
  class Lv2EffectBuilder(object):
      """
      Generates lv2 audio plugins instance (as :class:`Lv2Effect` object).
  
      .. note::
  
          In the current implementation, the data plugins are persisted
          in *plugins.json*.
      """
  
      def __init__(self, plugins_json=None):
          self.plugins = {}
  
          if plugins_json is None:
              plugins_json = os.path.dirname(__file__) + '/plugins.json'
  
          with open(plugins_json) as data_file:
              data = json.load(data_file)
  
          #supported_plugins = self._supported_plugins
          for plugin in data:
          #    if plugin['uri'] in supported_plugins:
                  self.plugins[plugin['uri']] = Lv2Plugin(plugin)
  
      @property
      def _supported_plugins(self):
          import subprocess
          return str(subprocess.check_output(['lv2ls'])).split('\\n')
  
      @property
      def all(self):
          return self.plugins
  
      def build(self, lv2_uri):
          """
          Returns a new :class:`Lv2Effect` by the valid lv2_uri
  
          :param string lv2_uri:
          :return Lv2Effect: Effect created
          """
          return Lv2Effect(self.plugins[lv2_uri])
  
subject: Fix lv2 effect builder for travis build