"""
  variable_nodes = {}

  for var_node in filter(_is_variable, graph_def.node):
    shared_name = str(var_node.attr['shared_name'].s, encoding='utf-8')
    variable_nodes[shared_name] = var_node

  for func in graph_def.library.function:
    for var_node in filter(_is_variable, func.node_def):
      variable_nodes[shared_name] = var_node

  return variable_nodes

RUN_CCM_CONTROLLERS: $(yaml-quote "${RUN_CCM_CONTROLLERS}")
EOF
  fi
  if [ -n "${PROVIDER_VARS:-}" ]; then
    local var_name
    local var_value

    for var_name in ${PROVIDER_VARS}; do
      eval "local var_value=\$(yaml-quote \${${var_name}})"
      cat >>"$file" <<EOF
${var_name}: ${var_value}
EOF
    done
  fi

  if [[ "${master}" == "true" ]]; then
    # Master-only env vars.

      brevity)
      ```mlir
        func.func @hoist_loop_invariant(%arg0, %arg1) {
          %var = "tf.VarHandleOp"() {container="", shared_name="var_name", device = "/device:CPU:0"}
          %results:2 = "tf.WhileRegion"(%arg0, %arg1) ({
          ^bb0(%arg2, %arg3):
            %0 = "tf.OpA"() {is_stateless = true}
            "tf.Yield"(%0)
          }, {

}

// cover runs, in effect,
//
//	go tool cover -mode=b.coverMode -var="varName" -o dst.go src.go
func (b *Builder) cover(a *Action, dst, src string, varName string) error {
	return b.Shell(a).run(a.Objdir, "", nil,
		cfg.BuildToolexec,
		base.Tool("cover"),
		"-mode", a.Package.Internal.Cover.Mode,
		"-var", varName,
		"-o", dst,
		src)
}

// cover2 runs, in effect,
//