Contents of reporting plugin system indices .opendistro-reports-definitions and .opendistro-reports-instances

Hello,

When we enable reporting plugin, 2 system indices gets created which are .opendistro-reports-definitions and .opendistro-reports-instances. Which occupies significant space when we create reports and definitions of any visualization.

As per my work around on this, .opendistro-reports-instances contains the metadata of reports that have been downloaded and .opendistro-reports-definitions contains metadata of the created definitions for the visualizations.

So I am trying to search the contents of above mentioned indices. What are the actual contents of .opendistro-reports-definitions and .opendistro-reports-instances ?

Thanks in advance !
Vivek