/**
     * Returns true if parallel project execution is enabled.
     *
     * @see #getMaxWorkerCount()
     */
    boolean isParallelProjectExecutionEnabled();

    /**
     * Enables/disables parallel project execution.
     *
     * @see #isParallelProjectExecutionEnabled()
     */
    void setParallelProjectExecutionEnabled(boolean parallelProjectExecution);

    /**

        this.parallelProjectExecution = parallelProjectExecution;
        this.maxWorkerCount = maxWorkerCount;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public boolean isParallelProjectExecutionEnabled() {
        return parallelProjectExecution;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void setParallelProjectExecutionEnabled(boolean parallelProjectExecution) {

        val isolatedProjects = startParameter.isolatedProjects.get()
        val parallelProjectExecution = isolatedProjects || requirements.startParameter.isParallelProjectExecutionEnabled
        val parallelToolingActions = parallelProjectExecution && options.getOption(parallelBuilding).get()
        val invalidateCoupledProjects = isolatedProjects && options.getOption(invalidateCoupledProjects).get()

        this.rerunTasks = rerunTasks;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public boolean isParallelProjectExecutionEnabled() {
        return parallelismConfiguration.isParallelProjectExecutionEnabled();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void setParallelProjectExecutionEnabled(boolean parallelProjectExecution) {

            warningModeSerializer.write(encoder, startParameter.getWarningMode());

            // Parallel configuration
            encoder.writeBoolean(startParameter.isParallelProjectExecutionEnabled());
            encoder.writeSmallInt(startParameter.getMaxWorkerCount());

            // Tasks
            writeTaskRequests(encoder, startParameter.getTaskRequests());

Method <org.gradle.concurrent.ParallelismConfiguration.isParallelProjectExecutionEnabled()> does not have raw return type assignable to org.gradle.api.provider.Property in (ParallelismConfiguration.java:0)