text: from maya import cmds
  
  import pyblish.api
  import pype.api
  import pype.hosts.maya.api.action
  
  
  class ValidateMeshLaminaFaces(pyblish.api.InstancePlugin):
      """Validate meshes don't have lamina faces.
  
      Lamina faces share all of their edges.
  
      """
  
      order = pype.api.ValidateMeshOrder
      hosts = ['maya']
      families = ['model']
      category = 'geometry'
      version = (0, 1, 0)
      label = 'Mesh Lamina Faces'
      actions = [pype.hosts.maya.api.action.SelectInvalidAction]
  
      @staticmethod
      def get_invalid(instance):
          meshes = cmds.ls(instance, type='mesh', long=True)
          invalid = [mesh for mesh in meshes if
                     cmds.polyInfo(mesh, laminaFaces=True)]
  
          return invalid
  
      def process(self, instance):
          """Process all the nodes in the instance 'objectSet'"""
  
          invalid = self.get_invalid(instance)
  
          if invalid:
              raise ValueError("Meshes found with lamina faces: "
                               "{0}".format(invalid))
  