first here:line $22$ to line $51(/**$

$*$ Constructs a BlockSuggestor object.

$*$ @param $\{$number$\}$ numBlocksPerCategory the size of each toolbox category

$*/$

constructor$($numBlocksPerCategory$)\{$

$/**$

$*$ Saves the full JSON data for each block type the first time it's used.

$*$ This helps store what initial configuration $/$ sub$-$blocks each block type

$*$ would be expected to have.

$*/$

this.defaultJsonForBlockLookup $=\{\}$;

$/**$

$*$ List of reently used block types

$*/$

this.recentlyUsedBlocks $=[]$;

$/**$

$*$ Checks if the workspace is finished loading, to avoid taking action on

$*$ all the BLOCK$\_$CREATE events during workspace loading.

$*/$

this.workspaceHasFinishedLoading $=$ false;

$/**$

$*$ Config parameter which sets the size of the toolbox categories.

$*/$

this.numBlocksPerCategory $=$ numBlocksPerCategory;

this.eventListener $=$ this.eventListener.bind$($this$)$;

this.getMostUsed $=$ this.getMostUsed.bind$($this$)$;

this.getRecentlyUsed $=$ this.getRecentlyUsed.bind$($this$)$;

this.generateBlockData $=$ this.generateBlockData.bind$($this$)$;

$\}$

$)$

second here:line $189($workspace$,)$

third here: line $181(*$ @param $\{$Blockly$.$WorkspaceSvg$\}$ workspace the workspace to load into$)$

the link on the $2$ point shows this:

$*$ @param opt$\_$options Optional dictionary of options.

$*$ @returns Newly created main workspace.

$*/$

export function inject$($

container: Element $|$ string,

opt$\_$options?: BlocklyOptions,

$)$: WorkspaceSvg $\{$

let containerElement: Element $|$ null $=$ null;

if $($typeof container $===$ 'string'$)\{$

containerElement $=$

document.getElementById$($container$)||$ document.querySelector$($container$)$;

$\}$ else $\{$

containerElement $=$ container;

$\}$