// Gets `variables` from `ctx`, locks them and builds XlaCompiler::Arguments
// using them. Stores the arguments in `args`. `variables` and `args` passed in
// will be cleared before populating them.
Status GetAndLockVariablesAndBuildXlaCompilerArguments(
    const OpKernelContext& ctx, const std::vector<const Tensor*>& inputs,
    const std::vector<int>& constant_indices,
    const std::vector<int>& variable_indices,
    std::vector<VariableInfo>* variables,