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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def setup_handler(context):
 """SENAITE setup handler """


    if context.readDataFile("bika.lims_various.txt") is None:
        return

    logger.info("SENAITE setup handler [BEGIN]")

    portal = context.getSite()

    # Run Installers
    remove_default_content(portal)
    hide_navbar_items(portal)
    reindex_content_structure(portal)
    setup_groups(portal)
    setup_catalog_mappings(portal)
    setup_core_catalogs(portal)

    # Setting up all LIMS catalogs defined in catalog folder
    setup_catalogs(portal, getCatalogDefinitions())

    # Run after all catalogs have been setup
    setup_auditlog_catalog(portal)

    logger.info("SENAITE setup handler [DONE]")