public Optional<CallResult> getCall(final DataFetchingEnvironment environment) {
    return executeCall(environment);
  }
Executes a call and returns the result.

@param environment the DataFetchingEnvironment
@return an Optional containing the result of the call execution if it exists, otherwise an
    empty Optional
ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/graphql/internal/pojoadapter/BlockAdapterBase.java