How to use the continuum.project.Project.find_project_dir function in continuum

from idautils import *

sys.path.append(
    os.path.join(
        os.path.dirname(os.path.realpath(__file__)),
        '..',
    )
)

from continuum import Continuum
from continuum.project import Project

# Connect to server instance.
proj = Project()
cont = Continuum()
proj.open(Project.find_project_dir(GetIdbDir()), skip_analysis=True)
cont.open_project(proj)

# Wait for auto-analysis to complete.
SetShortPrm(INF_AF2, GetShortPrm(INF_AF2) | AF2_DODATA)
print("Analyzing input file ...")
cont.client.send_analysis_state('auto-analysis')
Wait()

# Index types.
print("Indexing types ...")
cont.client.send_analysis_state('indexing-types')
proj.index.index_types_for_this_idb()

# Index symbols.
print("Indexing symbols ...")
cont.client.send_analysis_state('indexing-symbols')

def handle_open_idb(self, _, is_old_database):
        """Performs start-up tasks when a new IDB is loaded."""
        # Is IDB part of a continuum project? Open it.
        proj_dir = Project.find_project_dir(GetIdbDir())
        if proj_dir:
            project = Project()
            project.open(proj_dir)
            self.open_project(project)
            project.index.sync_types_into_idb()