public Builder valueFrom(@Nullable Output<EnvVarSourcePatchArgs> valueFrom) {
            $.valueFrom = valueFrom;
            return this;
        }
@param valueFrom Source for the environment variable&#39;s value. Cannot be used if value is not empty.

@return builder
sdk/java/src/main/java/com/pulumi/kubernetes/core/v1/inputs/EnvVarPatchArgs.java