text: export default {
      viewer: {},
      style: {
          node: {
              'content': 'data(id)',
              'text-opacity': 0,
              'text-valign': 'center',
              'text-halign': 'center',
              'label': 'data(id)',
              'background-opacity': 0,
              'background-image-opacity': 0,
              'background-repeat': 'no-repeat',
              'color': '#000',
              'border-color': '#000',
              'overlay-padding': '6px',
              'underlay-color': '#000',
              'underlay-opacity': 0,
              'opacity': 0,
              'border-width': 0,
              'padding': 0
          },
          internalEdge: {
              'line-color': '#37474F',
              'target-arrow-color': '#37474F',
              'overlay-color': '#4285F4',
              'overlay-padding': '4px',
              'underlay-color': '#4285F4',
              'underlay-padding': '3px',
              'underlay-opacity': '0'
          },
          collageEdge: {
              'line-color': '#178592',
              'target-arrow-color': '#178592',
              'overlay-color': '#4285F4',
              'overlay-padding': '6px',
              'underlay-color': '#000',
              'underlay-padding': '3px',
              'underlay-opacity': 0
          },
          collageSelected: {
              'overlay-color': '#000',
              'overlay-opacity': 0.1
          }
      },
      defaultLayout: {
          name: 'dagre',
          rankDir: 'TB'
      },
      loadedLayout: {
          name: 'preset',
          nodeDimensionsIncludeLabels: true,
      },
      options: {
          wheelSensitivity: 0.25,
          minZoom: 0.05,
          maxZoom: 4
      },
      externalOptions: {
          zoomStep: 0.05
      }
  };
  