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Execution failed for task ':app:compileDebugJavaWithJavac'.
java.lang.IllegalArgumentException: expected type but was null	at com.squareup.javapoet.CodeBlock$Builder.argToType(CodeBlock.java:225)	at com.squareup.javapoet.CodeBlock$Builder.add(CodeBlock.java:176)	at com.squareup.javapoet.CodeBlock.of(CodeBlock.java:94)	at com.squareup.javapoet.FieldSpec$Builder.initializer(FieldSpec.java:157)	at com.raizlabs.android.dbflow.processor.definition.column.ColumnDefinition.addPropertyDefinition(ColumnDefinition.java:256)	at com.raizlabs.android.dbflow.processor.definition.TableDefinition.onWriteDefinition(TableDefinition.java:487)	at com.raizlabs.android.dbflow.processor.definition.BaseDefinition.getTypeSpec(BaseDefinition.java:131)	at com.raizlabs.android.dbflow.processor.utils.WriterUtils.writeBaseDefinition(WriterUtils.java:17)	at com.raizlabs.android.dbflow.processor.model.ProcessorManager.handle(ProcessorManager.java:338)	at com.raizlabs.android.dbflow.processor.DBFlowProcessor.process(DBFlowProcessor.java:98)	at com.sun.tools.javac.processing.JavacProcessingEnvironment.callProcessor(JavacProcessingEnvironment.java:794)	at com.sun.tools.javac.processing.JavacProcessingEnvironment.discoverAndRunProcs(JavacProcessingEnvironment.java:705)	at com.sun.tools.javac.processing.JavacProcessingEnvironment.access$1800(JavacProcessingEnvironment.java:91)	at com.sun.tools.javac.processing.JavacProcessingEnvironment$Round.run(JavacProcessingEnvironment.java:1035)	at com.sun.tools.javac.processing.JavacProcessingEnvironment.doProcessing(JavacProcessingEnvironment.java:1176)	at com.sun.tools.javac.main.JavaCompiler.processAnnotations(JavaCompiler.java:1170)	at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:856)	at com.sun.tools.javac.main.Main.compile(Main.java:523)	at com.sun.tools.javac.api.JavacTaskImpl.doCall(JavacTaskImpl.java:129)	at com.sun.tools.javac.api.JavacTaskImpl.call(JavacTaskImpl.java:138)	at org.gradle.api.internal.tasks.compile.JdkJavaCompiler.execute(JdkJavaCompiler.java:46)	at org.gradle.api.internal.tasks.compile.JdkJavaCompiler.execute(JdkJavaCompiler.java:33)	at org.gradle.api.internal.tasks.compile.NormalizingJavaCompiler.delegateAndHandleErrors(NormalizingJavaCompiler.java:104)	at org.gradle.api.internal.tasks.compile.NormalizingJavaCompiler.execute(NormalizingJavaCompiler.java:53)	at org.gradle.api.internal.tasks.compile.NormalizingJavaCompiler.execute(NormalizingJavaCompiler.java:38)	at org.gradle.api.internal.tasks.compile.CleaningJavaCompilerSupport.execute(CleaningJavaCompilerSupport.java:35)	at org.gradle.api.internal.tasks.compile.CleaningJavaCompilerSupport.execute(CleaningJavaCompilerSupport.java:25)	at org.gradle.api.tasks.compile.JavaCompile.performCompilation(JavaCompile.java:163)	at org.gradle.api.tasks.compile.JavaCompile.compile(JavaCompile.java:145)	at org.gradle.api.tasks.compile.JavaCompile.compile(JavaCompile.java:93)	at com.android.build.gradle.tasks.factory.AndroidJavaCompile.compile(AndroidJavaCompile.java:49)	at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:75)	at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$IncrementalTaskAction.doExecute(AnnotationProcessingTaskFactory.java:245)	at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:221)	at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$IncrementalTaskAction.execute(AnnotationProcessingTaskFactory.java:232)	at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:210)	at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:80)	at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:61)	at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:46)	at org.gradle.api.internal.tasks.execution.PostExecutionAnalysisTaskExecuter.execute(PostExecutionAnalysisTaskExecuter.java:35)	at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:66)	at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:58)	at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:52)	at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:52)	at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:53)	at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)	at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:203)	at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:185)	at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.processTask(AbstractTaskPlanExecutor.java:66)	at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.run(AbstractTaskPlanExecutor.java:50)	at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:54)	at org.gradle.internal.concurrent.StoppableExecutorImpl$1.run(StoppableExecutorImpl.java:40)