/**
     * Sets the Lasta environment configuration.
     *
     * @param env the Lasta environment string
     * @return this ExecJob instance for method chaining
     */
    public ExecJob lastaEnv(final String env) {
        lastaEnv = env;
        return this;
    }

    /**
     * Adds a system property to the command list.
     * If the property exists in the system, it uses that value with optional append value.

            } else {
                cmdList.add("-Dlasta.env=" + systemLastaEnv);
            }
        } else if (StringUtil.isNotBlank(lastaEnv)) {
            cmdList.add("-Dlasta.env=" + lastaEnv);
        } else {
            cmdList.add("-Dlasta.env=" + getExecuteType());
        }

        addFessConfigProperties(cmdList);
        addFessSystemProperties(cmdList);

            } else {
                cmdList.add("-Dlasta.env=" + systemLastaEnv);
            }
        } else if (StringUtil.isNotBlank(lastaEnv)) {
            cmdList.add("-Dlasta.env=" + lastaEnv);
        } else {
            cmdList.add("-Dlasta.env=" + getExecuteType());
        }

        addFessConfigProperties(cmdList);
        addFessSystemProperties(cmdList);

            } else {
                cmdList.add("-Dlasta.env=" + systemLastaEnv);
            }
        } else if (StringUtil.isNotBlank(lastaEnv)) {
            cmdList.add("-Dlasta.env=" + lastaEnv);
        } else {
            cmdList.add("-Dlasta.env=" + getExecuteType());
        }

        addFessConfigProperties(cmdList);
        addFessSystemProperties(cmdList);