Tracing compile failure path for type 'com.google.common.collect.ComparisonChain'
[java] [ERROR] Errors in 'jar:file:/C:/Pratik/ETD/Import/Google/guava/21.0/guava-gwt-29.0-jre.jar!/com/google/common/collect/ComparisonChain.java'
[java] [ERROR] Line 191: Nullable cannot be resolved to a type
[java] [ERROR] Line 24: The import org.checkerframework cannot be resolved
[java] [ERROR] Line 140: Nullable cannot be resolved to a type
[java] [ERROR] Line 134: Nullable cannot be resolved to a type
[java] [ERROR] Line 78: Nullable cannot be resolved to a type
[java] [ERROR] Hint: Your source appears not to live underneath a subpackage called 'client'; no problem, but you'll need to use the <source> directive in your module to make it accessible