all: add parameter name to checkNotNull
After debugging #2153, it would have been nice to know what the exact
parameter was that was null. This change adds a name for each
checkNotNull (and tries to normalized on static imports in order to
shorten lines)
diff --git a/core/src/main/java/io/grpc/internal/AbstractManagedChannelImplBuilder.java b/core/src/main/java/io/grpc/internal/AbstractManagedChannelImplBuilder.java
index c514553..e896bfe 100644
--- a/core/src/main/java/io/grpc/internal/AbstractManagedChannelImplBuilder.java
+++ b/core/src/main/java/io/grpc/internal/AbstractManagedChannelImplBuilder.java
@@ -112,7 +112,7 @@
private long idleTimeoutMillis = ManagedChannelImpl.IDLE_TIMEOUT_MILLIS_DISABLE;
protected AbstractManagedChannelImplBuilder(String target) {
- this.target = Preconditions.checkNotNull(target);
+ this.target = Preconditions.checkNotNull(target, "target");
this.directServerAddress = null;
}