public Optional<Output<List<EnvFromSourceArgs>>> envFrom() {
        return Optional.ofNullable(this.envFrom);
    }
@return List of sources to populate environment variables in the container. The keys defined within a source must be a C_IDENTIFIER. All invalid keys will be reported as an event when the container is starting. When a key exists in multiple sources, the value associated with the last source will take precedence. Values defined by an Env with a duplicate key will take precedence. Cannot be updated.
sdk/java/src/main/java/com/pulumi/kubernetes/core/v1/inputs/ContainerArgs.java