code: def buildFeatureVariations(featureVariationRecords):
      """Build the FeatureVariations subtable."""
      fv = ot.FeatureVariations()
      fv.Version = 0x00010000
      fv.FeatureVariationRecord = featureVariationRecords
      fv.FeatureVariationCount = len(featureVariationRecords)
      return fv
  
imports: from fontTools.misc.dictTools import hashdict
  from fontTools.misc.intTools import bit_count
  from fontTools.ttLib import newTable
  from fontTools.ttLib.tables import otTables
  from fontTools.ttLib.ttVisitor import TTVisitor
  from fontTools.otlLib.builder import buildLookup, buildSingleSubstSubtable
  from collections import OrderedDict
  from .errors import VarLibError, VarLibValidationError
label_desc: Use image node_id 13 for calling a global function with example usage: buildFeatureVariations(featureVariationRecords) and returns: fv