feat(#286): fix CI mdoc error in readme

Author: arnaud-daroussin

README.md

@@ -358,8 +358,11 @@ implicit val mapper2: TypeMapper[WrappedString, String] = new TypeMapper[Wrapped
 
 Type-information of default ordering are available in `org.apache.flinkx.api.serializer.OrderingTypeInfo` and can be used as follows:
 ```scala mdoc:reset-object
+import org.apache.flink.api.common.typeinfo.TypeInformation
 import org.apache.flinkx.api._
+import org.apache.flinkx.api.serializer.OrderingTypeInfo
 import org.apache.flinkx.api.serializers._
+import scala.collection.immutable.SortedSet
 
 case class Foo(bars: SortedSet[String])
 
@@ -375,8 +378,11 @@ object Foo {
 
 It's also possible to derive the type-information of a custom ordering if it's an ADT:
 ```scala mdoc:reset-object
+import org.apache.flink.api.common.typeinfo.TypeInformation
 import org.apache.flinkx.api._
+import org.apache.flinkx.api.serializer.OrderingTypeInfo
 import org.apache.flinkx.api.serializers._
+import scala.collection.immutable.SortedSet
 
 case class Bar(a: Int, b: String)
 

modules/flink-common-api/src/main/scala/org/apache/flinkx/api/serializers.scala

@@ -3,26 +3,34 @@ package org.apache.flinkx.api
 import org.apache.flink.api.common.serialization.{SerializerConfig, SerializerConfigImpl}
 import org.apache.flink.api.common.typeinfo.{BasicTypeInfo, LocalTimeTypeInfo, TypeInformation}
 import org.apache.flink.api.common.typeutils.TypeSerializer
+import org.apache.flink.api.common.typeutils.base.{
+  BooleanSerializer,
+  ByteSerializer,
+  CharSerializer,
+  DoubleSerializer,
+  FloatSerializer,
+  IntSerializer,
+  LongSerializer,
+  ShortSerializer
+}
 import org.apache.flink.api.common.typeutils.base.array._
-import org.apache.flink.api.common.typeutils.base.{ListSerializer, MapSerializer, _}
 import org.apache.flink.api.java.typeutils.EnumTypeInfo
 import org.apache.flink.types.{Nothing => FlinkNothing}
 import org.apache.flinkx.api.mapper.{BigDecMapper, BigIntMapper, UuidMapper}
 import org.apache.flinkx.api.serializer.MappedSerializer.TypeMapper
 import org.apache.flinkx.api.serializer._
 import org.apache.flinkx.api.typeinfo._
 
-import java.lang.{
-  Boolean => JBoolean,
-  Byte => JByte,
-  Character => JCharacter,
-  Double => JDouble,
-  Float => JFloat,
-  Integer => JInteger,
-  Long => JLong,
-  Short => JShort
-}
-import java.math.{BigDecimal => JBigDecimal, BigInteger => JBigInteger}
+import java.lang.{Float => JFloat}
+import java.lang.{Long => JLong}
+import java.lang.{Double => JDouble}
+import java.lang.{Short => JShort}
+import java.lang.{Byte => JByte}
+import java.lang.{Boolean => JBoolean}
+import java.lang.{Integer => JInteger}
+import java.lang.{Character => JCharacter}
+import java.math.{BigInteger => JBigInteger}
+import java.math.{BigDecimal => JBigDecimal}
 import java.time._
 import java.util.UUID
 import scala.collection.immutable.{SortedSet, TreeSet}
@@ -107,12 +115,9 @@ trait serializers extends LowPrioImplicits {
   implicit lazy val finiteDurationInfo: TypeInformation[FiniteDuration] = SimpleTypeInfo(2, 2, keyType = true)
   implicit lazy val flinkNothingInfo: TypeInformation[FlinkNothing]     =
     SimpleTypeInfo(0)(classTag[FlinkNothing], new NothingSerializer().asInstanceOf[TypeSerializer[FlinkNothing]])
-  implicit lazy val scalaNothingInfo: TypeInformation[scala.Nothing] =
+  implicit lazy val scalaNothingInfo: TypeInformation[Nothing] =
     // At runtime scala.Nothing is scala.runtime.Nothing$ and extends Throwable
-    SimpleTypeInfo[scala.Nothing](6, 11)(
-      classTag[scala.Nothing],
-      new NothingSerializer().asInstanceOf[TypeSerializer[scala.Nothing]]
-    )
+    SimpleTypeInfo[Nothing](6, 11)(classTag[Nothing], new NothingSerializer().asInstanceOf[TypeSerializer[Nothing]])
   implicit lazy val timeUnitInfo: TypeInformation[TimeUnit]           = new EnumTypeInfo(classOf[TimeUnit])
   implicit lazy val uuidMapper: TypeMapper[UUID, Array[Byte]]         = new UuidMapper()
   implicit lazy val uuidInfo: TypeInformation[UUID]                   = mappedTypeInfo[UUID, Array[Byte]]