TypeError: Cannot read property 'length' of undefined
    at LuaTransformer.getIdentifierText (typescript-to-lua/src/LuaTransformer.ts:4340:25)
    at LuaTransformer.transformIdentifier (typescript-to-lua/src/LuaTransformer.ts:4360:34)
    at LuaTransformer.transformParameterDefaultValueDeclaration (typescript-to-lua/src/LuaTransformer.ts:1290:36)
    at parameters.filter.map.declaration (typescript-to-lua/src/LuaTransformer.ts:1260:38)
    at Array.map (<anonymous>)
    at LuaTransformer.transformFunctionBody (typescript-to-lua/src/LuaTransformer.ts:1260:14)
    at LuaTransformer.transformFunctionDeclaration (typescript-to-lua/src/LuaTransformer.ts:1721:20)
    at LuaTransformer.transformStatement (typescript-to-lua/src/LuaTransformer.ts:168:29)
    at statements.forEach.statement (typescript-to-lua/src/LuaTransformer.ts:215:74)
    at Array.forEach (<anonymous>)