sub binding_index_aref

help bind a parameter (in calling module) 
to a callback via a mouse-click

sub get_binding_index_aref

sub get_max_index

sub file_dialog_type_aref

sub get_file_dialog_type_aref

sub flow_type_aref

an array to define the type of flow that is
being used, e.g., user_built or pre-built superflow (this case)
important for binding buttons to opening certain directories

sub get_flow_type_aref

sub get_prefix_aref

sub get_suffix_aref

sub prefix_aref

sub suffix_aref

sub get_binding_length

sub variables

return a hash array 
with definitions